Push twines deeper into SourceMgr's error handling methods.

llvm-svn: 114847
diff --git a/llvm/lib/AsmParser/LLParser.h b/llvm/lib/AsmParser/LLParser.h
index 404cec3..1baa7d8 100644
--- a/llvm/lib/AsmParser/LLParser.h
+++ b/llvm/lib/AsmParser/LLParser.h
@@ -142,10 +142,10 @@
 
   private:
 
-    bool Error(LocTy L, const std::string &Msg) const {
+    bool Error(LocTy L, const Twine &Msg) const {
       return Lex.Error(L, Msg);
     }
-    bool TokError(const std::string &Msg) const {
+    bool TokError(const Twine &Msg) const {
       return Error(Lex.getLoc(), Msg);
     }