use HandleWindowEvent() instead of ProcessEvent() to avoid crashes if the toolbar left click handler throws under wxGTK

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58498 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/tbarbase.cpp

@@ -625,7 +625,7 @@ bool wxToolBarBase::OnLeftClick(int id, bool toggleDown)
     event.SetExtraLong((long)toggleDown);
 
     // Send events to this toolbar instead (and thence up the window hierarchy)
-    GetEventHandler()->ProcessEvent(event);
+    HandleWindowEvent(event);
 
     return true;
 }