Change the diagnostics interface to take an array of pointers to 
strings instead of array of strings.  This reduces string copying
in some not-very-important cases, but paves the way for future 
improvements.

llvm-svn: 59494
diff --git a/clang/lib/Parse/DeclSpec.cpp b/clang/lib/Parse/DeclSpec.cpp
index e800761..733c37c 100644
--- a/clang/lib/Parse/DeclSpec.cpp
+++ b/clang/lib/Parse/DeclSpec.cpp
@@ -311,6 +311,7 @@
 }
   
 void DeclSpec::Diag(Diagnostic &D, SourceLocation Loc, SourceManager& SrcMgr,
-          unsigned DiagID, const std::string &info) {
-  D.Report(FullSourceLoc(Loc,SrcMgr), DiagID, &info, 1);
+          unsigned DiagID, const std::string &Info) {
+  const std::string *Strs[] = { &Info };
+  D.Report(FullSourceLoc(Loc,SrcMgr), DiagID, Strs, 1);
 }