Fix wxHMI example after upgrading wxGlade

Newer wxGlade generates code to initialize GridSizer's with empty
elements.

...
grid_sizer_1.Add(self.window_1, 1, wx.ALIGN_CENTER, 0)
sizer_2.Add((0, 0), 0, 0, 0)
sizer_2.Add((0, 0), 0, 0, 0)
sizer_2.Add((0, 0), 0, 0, 0)
sizer_2.Add((0, 0), 0, 0, 0)
...

That causes following traceback, if new buttons are added
to already full sizer.

PLCobject : Traceback (most recent call last):

File "./Beremiz_service.py", line 389, in default_evaluator
res = (tocall(*args, **kwargs), None)

File "/tmp/tmpQS8ct2/runtime_0.py", line 540, in _runtime_0_start
wx.MessageBox(_("Please stop PLC to close"))

File "/tmp/tmpQS8ct2/runtime_0.py", line 504, in Init
lambda axis:( MakeButtonFunc(self, sizer, axis+"axisMinus"),

File "/tmp/tmpQS8ct2/runtime_0.py", line 502, in <lambda>
lambda btname: MakeButtonFunc(self, sizer, btname), ActionButtons)

File "/tmp/tmpQS8ct2/runtime_0.py", line 461, in MakeButtonFunc
print sizer, btname

File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk3/wx/_core.py", line 14453, in Add
return _core_.Sizer_Add(*args, **kwargs)

PyAssertionError: C++ assertion "Assert failure" failed at
../src/common/sizer.cpp(1401) in DoInsert(): too many items (11 > 2*5)
in grid sizer (maybe you should omit the number of either rows or
columns?)


Tested with wxGlade version 0.8.3
Closes #41

     1

// import Nevow.Athena

     2

     3

function init() {

     4

  Nevow.Athena.Widget.fromAthenaID(1).callRemote('HMIexec', 'HMIinitialisation');

     5

}

     6

     7

WebInterface.PLC = Nevow.Athena.Widget.subclass('WebInterface.PLC');

     8

WebInterface.PLC.method(

     9

	 'updateHMI',

    10

	 function (self, data) {

    11

	   d = self.callRemote('getPLCElement');

    12

	   d.addCallback(

    13

			 function liveElementReceived(le) {

    14

				d2 = self.addChildWidgetFromWidgetInfo(le);

    15

				d2.addCallback(

    16

						function childAdded(widget) {

    17

						var node = self.nodeById('content');

    18

						node.replaceChild(widget.node, node.getElementsByTagName('div')[0]);

    19

						init();

    20

						});

    21

				});

    22

	   });

    23

    24

Divmod.Base.addLoadEvent(init);