Fix warning about RegionStoreManager::Retrieve() not always returning a value.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59571 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/RegionStore.cpp b/lib/Analysis/RegionStore.cpp
index 6eba8bb..1831208 100644
--- a/lib/Analysis/RegionStore.cpp
+++ b/lib/Analysis/RegionStore.cpp
@@ -315,7 +315,7 @@
 
   default:
     assert(false && "Invalid Location");
-    break;
+    return L;
   }
 }