squash warnings.

llvm-svn: 61707
diff --git a/llvm/lib/Target/ELFTargetAsmInfo.cpp b/llvm/lib/Target/ELFTargetAsmInfo.cpp
index 47727d1..76e0b1b 100644
--- a/llvm/lib/Target/ELFTargetAsmInfo.cpp
+++ b/llvm/lib/Target/ELFTargetAsmInfo.cpp
@@ -86,6 +86,8 @@
     }
   } else
     assert(0 && "Unsupported global");
+
+  return NULL;
 }
 
 const Section*