catch exceptions from ConvertToBitmap and bail out

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@45974 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/wx/lib/imagebrowser.py

@@ -95,7 +95,10 @@ class ImageView(wx.Window):
         if image is None:
             return
 
+        try:
             bmp = image.ConvertToBitmap()
+        except:
+            return
 
         iwidth = bmp.GetWidth()   # dimensions of image file
         iheight = bmp.GetHeight()