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

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

docs/changes.txt

@@ -85,6 +85,7 @@ All (GUI):
 - wxListCtrl now sends an END_LABEL event if editing was cancelled, too
 - bug in wxRect ctor from two [out of order] wxPoints fixed (Steve Cornett)
 - status text is now restored after wxMenu help is shown in it
+- bug in wxWindow::RemoveEventHandler() fixed (Yingjun Zhang)
 
 wxMSW:
 

src/common/wincmn.cpp

@@ -812,7 +812,9 @@ bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handler)
             {
                 handlerNext->SetPreviousHandler ( handlerPrev );
             }
+
             handler->SetNextHandler(NULL);
+            handler->SetPreviousHandler(NULL);
 
             return TRUE;
         }