Make sure the __invoke function for lambdas returns properly.  Per bug report on IRC>

llvm-svn: 170160
diff --git a/clang/lib/CodeGen/CGClass.cpp b/clang/lib/CodeGen/CGClass.cpp
index b2225e4..9df8905 100644
--- a/clang/lib/CodeGen/CGClass.cpp
+++ b/clang/lib/CodeGen/CGClass.cpp
@@ -1787,6 +1787,8 @@
   // If necessary, copy the returned value into the slot.
   if (!resultType->isVoidType() && returnSlot.isNull())
     EmitReturnOfRValue(RV, resultType);
+  else
+    EmitBranchThroughCleanup(ReturnBlock);
 }
 
 void CodeGenFunction::EmitLambdaBlockInvokeBody() {