Small cleanup of literal semantic analysis: hiding 'char *' pointers behind
StringRef makes code cleaner.  Also, make the temporary buffer smaller:
512 characters is unreasonably large for integer literals.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164484 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/PPExpressions.cpp b/lib/Lex/PPExpressions.cpp
index 49dfa19..f5984f5 100644
--- a/lib/Lex/PPExpressions.cpp
+++ b/lib/Lex/PPExpressions.cpp
@@ -206,8 +206,7 @@
     if (NumberInvalid)
       return true; // a diagnostic was already reported
 
-    NumericLiteralParser Literal(Spelling.begin(), Spelling.end(),
-                                 PeekTok.getLocation(), PP);
+    NumericLiteralParser Literal(Spelling, PeekTok.getLocation(), PP);
     if (Literal.hadError)
       return true; // a diagnostic was already reported.