1. added wxEvtHandler::SafelyProcessEvent() and wxWindow::HandleWindowEvent() to correctly handle exceptions in even handlers in wxGTK

2. use HandleWindowEvent() everywhere as more obvious and convenient shortcut for GetEventHandler()->ProcessEvent(); also for consistency with wxGTK where it's required

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50329 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/os2/listbox.cpp

@@ -660,7 +660,7 @@ bool wxListBox::OS2Command(
         n = -1;
     }
     vEvent.SetInt(n);
-    return GetEventHandler()->ProcessEvent(vEvent);
+    return HandleWindowEvent(vEvent);
 } // end of wxListBox::OS2Command
 
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