Update for LLVM API change to make Small(Ptr)Set::insert return pair<iterator, bool> as per the C++ standard's associative container concept.

llvm-svn: 222335
diff --git a/clang/lib/CodeGen/CGException.cpp b/clang/lib/CodeGen/CGException.cpp
index b147b43..8cd49d1 100644
--- a/clang/lib/CodeGen/CGException.cpp
+++ b/clang/lib/CodeGen/CGException.cpp
@@ -817,7 +817,7 @@
       }
 
       // Check whether we already have a handler for this type.
-      if (catchTypes.insert(handler.Type))
+      if (catchTypes.insert(handler.Type).second)
         // If not, add it directly to the landingpad.
         LPadInst->addClause(handler.Type);
     }