Let SourceManager::getBufferData return StringRef instead of a pair of two const char*.

llvm-svn: 98630
diff --git a/clang/lib/Lex/TokenLexer.cpp b/clang/lib/Lex/TokenLexer.cpp
index 8f68765..dbd1b84 100644
--- a/clang/lib/Lex/TokenLexer.cpp
+++ b/clang/lib/Lex/TokenLexer.cpp
@@ -441,7 +441,7 @@
 
       bool Invalid = false;
       const char *ScratchBufStart
-        = SourceMgr.getBufferData(LocFileID, &Invalid).first;
+        = SourceMgr.getBufferData(LocFileID, &Invalid).data();
       if (Invalid)
         return false;