fix issue, then it wasn't possible to view FBD programs

the reason for that is possible wx-3.0-gtk2 bug that happens if
ALWAYS_SHOW_SB is set.

Traceback (most recent call last):
File "Beremiz.py", line 1045, in OnProjectTreeItemActivated
IDEFrame.OnProjectTreeItemActivated(self, event)
File "IDEFrame.py", line 1667, in OnProjectTreeItemActivated
self.EditProjectElement(item_infos["type"], item_infos["tagname"])
File "IDEFrame.py", line 1752, in EditProjectElement
new_window = Viewer(self.TabsOpened, tagname, self, self.Controler)
File "editors/Viewer.py", line 611, in __init__
EditorPanel.__init__(self, parent, tagname, window, controler, debug)
File "editors/EditorPanel.py", line 68, in __init__
self._init_ctrls(parent)
File "editors/EditorPanel.py", line 52, in _init_ctrls
self._init_Editor(self)
File "editors/Viewer.py", line 603, in _init_Editor
style=wx.HSCROLL | wx.VSCROLL | wx.ALWAYS_SHOW_SB)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_windows.py", line 296, in __init__
_windows_.ScrolledWindow_swiginit(self,_windows_.new_ScrolledWindow(*args, **kwargs))
PyAssertionError: C++ assertion "scrolled" failed at ../src/gtk/scrolwin.cpp(205) in DoShowScrollbars(): window must be created

     1

<?xml version='1.0' encoding='utf-8'?>

     2

<PyFile xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

     3

  <variables/>

     4

  <globals>

     5

    <xhtml:p><![CDATA[]]></xhtml:p>

     6

  </globals>

     7

  <init>

     8

    <xhtml:p><![CDATA[]]></xhtml:p>

     9

  </init>

    10

  <cleanup>

    11

    <xhtml:p><![CDATA[]]></xhtml:p>

    12

  </cleanup>

    13

  <start>

    14

    <xhtml:p><![CDATA[]]></xhtml:p>

    15

  </start>

    16

  <stop>

    17

    <xhtml:p><![CDATA[]]></xhtml:p>

    18

  </stop>

    19

</PyFile>