Avoid warning message


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3085 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp
index 81c10b7..dd88653 100644
--- a/lib/Target/CBackend/Writer.cpp
+++ b/lib/Target/CBackend/Writer.cpp
@@ -114,6 +114,7 @@
   default:
     std::cerr << "Unknown constant type: " << CPV << "\n";
     abort();
+    return "";
   }
 }