Additional fix for rewrite ForceVariableDialog commit (9076249f)

fix following backtrace:

Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk3/wx/_core.py", line 16765, in <lambda>
lambda event: event.callable(*event.args, **event.kw) )
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/DebugVariablePanel/DebugVariableViewer.py", line 232, in HandleButton
button.ProcessCallback()
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/DebugVariablePanel/GraphButton.py", line 156, in ProcessCallback
self.Callback()
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/DebugVariablePanel/DebugVariableViewer.py", line 350, in OnForceButton
self.ForceValue(self.ItemsDict.values()[0])
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/DebugVariablePanel/DebugVariableViewer.py", line 428, in ForceValue
dialog.GetValue())
File "/home/developer/WorkData/PLC/beremiz/beremiz/dialogs/ForceVariableDialog.py", line 232, in GetValue
return GetTypeValue[self.IEC_Type](wx.TextEntryDialog.GetValue(self))
TypeError: unbound method GetValue() must be called with TextEntryDialog instance as first argument (got ForceVariableDialog instance instead)

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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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#

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# See COPYING.Runtime file for copyrights details.

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#

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from __future__ import absolute_import

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from ctypes import CDLL, RTLD_GLOBAL, pointer, c_int, POINTER, c_char, create_string_buffer

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def TryPreloadXenomai():

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    """

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    Xenomai 3 (at least for version <= 3.0.6) do not handle properly dlclose

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    of shared objects whose dlopen did trigger xenomai_init.

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    As a workaround, this pre-loads xenomai libraries that need to be

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    initialized and call xenomai_init once for all.

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    Xenomai auto init of libs MUST be disabled (see --auto-init-solib in xeno-config)

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    """

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    try:

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        for name in ["cobalt", "modechk", "copperplate", "alchemy"]:

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            globals()[name] = CDLL("lib"+name+".so", mode=RTLD_GLOBAL)

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        cobalt.xenomai_init(pointer(c_int(0)), pointer((POINTER(c_char)*2)(create_string_buffer("prog_name"), None)))

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    except Exception:

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        pass