RemoveEventHandler() didn't reset all pointers correctly (patch 819545)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@24197 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -185,6 +185,10 @@ All:
 
 - Spanish translations updated (Javier San Jose)
 
+All (GUI):
+
+- bug in wxWindow::RemoveEventHandler() fixed (Yingjun Zhang)
+
 wxMSW:
 
 - strip ampersands from strings returned by wxMenuBar::GetLabelTop()

src/common/wincmn.cpp

@@ -788,7 +788,9 @@ bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handler)
             {
                 handlerNext->SetPreviousHandler ( handlerPrev );
             }
+
             handler->SetNextHandler(NULL);
+            handler->SetPreviousHandler(NULL);
 
             return TRUE;
         }