Added the missing newline that was upsetting Unix native compilers.

layout/xul/base/src/nsMenuFrame.cpp

@@ -977,4 +977,4 @@ nsMenuFrame::AppendFrames(nsIPresContext& aPresContext,
   }
   
   return nsHTMLContainerFrame::AppendFrames(aPresContext, aPresShell, aListName, aFrameList); 
-}
+}