More warnings for unused expressions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77763 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaStmt.cpp b/lib/Sema/SemaStmt.cpp
index f00d600..65611f2 100644
--- a/lib/Sema/SemaStmt.cpp
+++ b/lib/Sema/SemaStmt.cpp
@@ -649,6 +649,8 @@
         << SecondType << Second->getSourceRange());
   }
   
+  DiagnoseUnusedExprResult(First);
+  DiagnoseUnusedExprResult(Third);
   DiagnoseUnusedExprResult(Body);
 
   first.release();