make attribute CFLAGS and LDFLAGS optional and add default empty value

Actually CFLAGS and LDFLAGS are not required and can be empty.
Without default empty value if target platform in project settings was
set to "Linux" CFLAGS and LDFLAGS was initialized with NoneType.
The result was broken build and it wasn't to save/load project with
such settings.

Traceback (most recent call last):
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 956, in _Build
if not builder.build() :
File "/home/developer/WorkData/PLC/beremiz/beremiz/targets/toolchain_gcc.py", line 96, in build
Builder_CFLAGS = ' '.join(self.getBuilderCFLAGS())
TypeError: sequence item 0: expected string, NoneType found

fix issue, when structure data type with array field is created

Traceback (most recent call last):
File "editors/DataTypeEditor.py", line 669, in ElementArrayTypeFunction
self.RefreshTypeInfos()
File "editors/DataTypeEditor.py", line 761, in RefreshTypeInfos
self.Controler.SetDataTypeInfos(self.TagName, infos)
File "PLCControler.py", line 2075, in SetDataTypeInfos
array.baseType.setcontent(PLCOpenParser.CreateElement(
AttributeError: 'lxml.etree._Element' object has no attribute 'setcontent'

fixes sometimes happened error during project compilation

Traceback (most recent call last):
File "./Beremiz.py", line 1229, in run_with_except_hook
run_old(*args, **kw)
File
"/home/developer/WorkData/PLC/beremiz/beremiz/util/ProcessLogger.py",
line 68, in run
self.endcallback(self.Proc.pid, err)
File
"/home/developer/WorkData/PLC/beremiz/beremiz/util/ProcessLogger.py",
line 169, in finish
if self.timeout: self.timeout.cancel()
AttributeError: ProcessLogger instance has no attribute 'timeout'

merge

Use '-p' command line option when running matiec (iec2c)

Add command line option '-l' when calling matiec

merge

merge

merge

Update __SET_VAR() macros to reflect changes made to matiec

Merged

Merged

Fixed win32 build warning caused by leftover debug code

Fixed win32 runtime crashing when attempting to log before errors before PLC start. Added pictures to wxHMI and fixed it so that it loads on windows as well

Fixed canfestival extension own path resolution

Changed runtime's global PLCID to PLC_ID, working around redefinition in windoze' headers.

Extended wxHMI test

Added wxHMI test

merged forgotten changesets

Added log message when RETAIN memory not valid

Fixed leftover typo

Added PLCID variable accessible from C side, set with binarie's MD5. Added retain init and cleanup calls. Extended tests/python to test PLCID

Splitted plc_Xenomai_main.c to enable further customization

add pyrossl client side