Fix crash if LD input contact isn't connected

Traceback (most recent call last):
File "/home/developer/WorkData/PLC/beremiz/beremiz/BeremizIDE.py", line 339, in OnMethod
obj.CTR.CallMethod('_'+meth)
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 1996, in CallMethod
getattr(self, method)()
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 1134, in _Build
IECGenRes = self._Generate_SoftPLC()
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 746, in _Generate_SoftPLC
if self._Generate_PLC_ST():
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 763, in _Generate_PLC_ST
self._getIECgeneratedcodepath())
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCControler.py", line 456, in GenerateProgram
self.ProgramChunks = GenerateCurrentProgram(self, self.Project, errors, warnings)
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCGenerator.py", line 1762, in GenerateCurrentProgram
generator.GenerateProgram()
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCGenerator.py", line 478, in GenerateProgram
self.GeneratePouProgram(pou_name)
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCGenerator.py", line 260, in GeneratePouProgram
program = pou_program.GenerateProgram(pou)
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCGenerator.py", line 1718, in GenerateProgram
self.ComputeProgram(pou)
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCGenerator.py", line 1028, in ComputeProgram
self.GenerateBlock(instance, block_infos, body, None)
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCGenerator.py", line 1144, in GenerateBlock
expression = self.ComputeExpression(body, connections, executionOrderId > 0)
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCGenerator.py", line 1373, in ComputeExpression
paths = self.GeneratePaths(connections, body, order, to_inout)
File "/home/developer/WorkData/PLC/beremiz/beremiz/PLCGenerator.py", line 1344, in GeneratePaths
elif isinstance(result[0], list):
IndexError: list index out of range


Close #70

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# SOME DESCRIPTIVE TITLE.

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# Copyright (C) is 21st century inquisition

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# This file is distributed under the same license as the Beremiz package.

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# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.

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#

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msgid ""

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msgstr ""

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"Project-Id-Version: Beremiz 1.1\n"

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"Report-Msgid-Bugs-To: \n"

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"POT-Creation-Date: 2012-09-08 00:41\n"

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"PO-Revision-Date: 2012-09-07 11:18+0100\n"

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# b82e66796943449ea9e01b02ddcd12ca

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#: ../../overview.rst:2

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msgid "Project overview"

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msgstr "Vue d'ensemble sur le projet"

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# 32289df91d6b4cdeb2c54604118bfc69

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#: ../../overview.rst:4

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msgid ""

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"In order to target the widest possible range of programmable devices and "

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"keep efficient, Beremiz use C code as an intermediate language."

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msgstr ""

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"Dans le but de viser la plus grande variété de dispositifs programmables "

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"tout en restant efficace, Beremiz utilise le C comme langage intermédiaire."

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# 6abccf881e4e478987befa2e9ce5a9ce

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#: ../../overview.rst:6

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msgid ""

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"To be executed, C needs to be compiled. `GCC <http://gcc.gnu.org>`_ serve "

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"Afin de pouvoir être exécuté le C doit être compilé. Le `GCC <http://gcc.gnu."

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"PLC program is expressed in languages defined in IEC-61131, including "

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"graphical languages. Thanks to PLCopen TC2, those graphical languages have a "

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msgstr ""

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"Les programmes destinés au automates programmables sont exprimés dans les "

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"langages définis par la norme IEC-61131, incluant des langages graphiques. "

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"Thanks to PLCopen TC2, those graphical languages have a standardised "

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"representation, in XML."

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# a6318fafe7b948a2b59e153b23de51f2

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#: ../../overview.rst:10

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msgid "To be continued."

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msgstr ""