squash warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61707 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetAsmInfo.cpp b/lib/Target/TargetAsmInfo.cpp
index 5cf298a..0cf969c 100644
--- a/lib/Target/TargetAsmInfo.cpp
+++ b/lib/Target/TargetAsmInfo.cpp
@@ -342,6 +342,7 @@
    default:
     assert(0 && "Unknown section kind");
   }
+  return NULL;
 }
 
 const Section*