Silence another GCC warning.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160488 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Core/Calls.cpp b/lib/StaticAnalyzer/Core/Calls.cpp
index 5c161ba..22fea32 100644
--- a/lib/StaticAnalyzer/Core/Calls.cpp
+++ b/lib/StaticAnalyzer/Core/Calls.cpp
@@ -537,6 +537,7 @@
   case OCM_Subscript:
     return getContainingPseudoObjectExpr()->getSourceRange();
   }
+  llvm_unreachable("unknown message kind");
 }
 
 typedef llvm::PointerIntPair<const PseudoObjectExpr *, 2> ObjCMessageDataTy;
@@ -592,4 +593,3 @@
     return OCM_Message;
   return static_cast<ObjCMessageKind>(Info.getInt());
 }
-