fix wrong Row number in DiscoveryDialog.py that caused following traceback:

Traceback (most recent call last):
File "/home/beremiz/beremiz/ProjectController.py", line 1536, in _Connect
dialog = DiscoveryDialog(self.AppFrame)
File "/home/beremiz/beremiz/dialogs/DiscoveryDialog.py", line 124, in __init__
self._init_ctrls(parent)
File "/home/beremiz/beremiz/dialogs/DiscoveryDialog.py", line 121, in _init_ctrls
self._init_sizers()
File "/home/beremiz/beremiz/dialogs/DiscoveryDialog.py", line 73, in _init_sizers
self._init_coll_ButtonGridSizer_Growables(self.ButtonGridSizer)
File "/home/beremiz/beremiz/dialogs/DiscoveryDialog.py", line 64, in _init_coll_ButtonGridSizer_Growables
parent.AddGrowableRow(1)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_core.py", line 15343, in AddGrowableRow
return _core_.FlexGridSizer_AddGrowableRow(*args, **kwargs)
PyAssertionError: C++ assertion "!m_rows || idx < (size_t)m_rows" failed at ../src/common/sizer.cpp(1967) in AddGrowableRow(): invalid row index

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"""

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Misc definitions

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"""

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import os,sys

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# helper func to check path write permission

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def CheckPathPerm(path):

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    if path is None or not os.path.isdir(path):

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        return False

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    for root, dirs, files in os.walk(path):

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         for name in files:

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             if os.access(root, os.W_OK) is not True or os.access(os.path.join(root, name), os.W_OK) is not True:

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                 return False

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    return True

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def GetClassImporter(classpath):

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    if type(classpath)==str:

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        def fac():

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            mod=__import__(classpath.rsplit('.',1)[0])

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            return reduce(getattr, classpath.split('.')[1:], mod)

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        return fac

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    else:

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        return classpath

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def InstallLocalRessources(CWD):

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    from BitmapLibrary import AddBitmapFolder

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    from TranslationCatalogs import AddCatalog

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    import wx

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    # Beremiz bitmaps

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    AddBitmapFolder(os.path.join(CWD, "images"))

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    # Internationalization

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    AddCatalog(os.path.join(CWD, "locale"))

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    import gettext

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    import __builtin__

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    __builtin__.__dict__['_'] = wx.GetTranslation

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