MC: Fix the MCNullStreamer which was broken in r147763.

llvm-svn: 151213
diff --git a/llvm/lib/MC/MCNullStreamer.cpp b/llvm/lib/MC/MCNullStreamer.cpp
index ba7f81f..7ff2d1b 100644
--- a/llvm/lib/MC/MCNullStreamer.cpp
+++ b/llvm/lib/MC/MCNullStreamer.cpp
@@ -95,6 +95,10 @@
     virtual void EmitInstruction(const MCInst &Inst) {}
 
     virtual void FinishImpl() {}
+
+    virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+      RecordProcEnd(Frame);
+    }
     
     /// @}
   };