Last part of fix for bug 118633 - null frame checks. r=jgaunt, sr=hewitt

layout/base/nsPresShell.cpp

@@ -6034,6 +6034,8 @@ PresShell::HandleEventInternal(nsEvent* aEvent, nsIView *aView, PRUint32 aFlags,
     void*     clientData;
     aView->GetClientData(clientData);
     nsIFrame* frame = (nsIFrame *)clientData;
+    if (!frame)
+      return NS_ERROR_FAILURE;
     return frame->HandleEvent(mPresContext, (nsGUIEvent*)aEvent, aStatus);
   }
 #endif

layout/html/base/src/nsPresShell.cpp

@@ -6034,6 +6034,8 @@ PresShell::HandleEventInternal(nsEvent* aEvent, nsIView *aView, PRUint32 aFlags,
     void*     clientData;
     aView->GetClientData(clientData);
     nsIFrame* frame = (nsIFrame *)clientData;
+    if (!frame)
+      return NS_ERROR_FAILURE;
     return frame->HandleEvent(mPresContext, (nsGUIEvent*)aEvent, aStatus);
   }
 #endif