remove a sneaky version of Diag hiding in PreprocessorLexer.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59858 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index 3087569..cef848f 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -313,6 +313,11 @@
   return PP->Diag(getSourceLocation(Loc), DiagID);
 }
 
+DiagnosticBuilder Lexer::Diag(SourceLocation Loc, unsigned DiagID) const {
+  return PP->Diag(Loc, DiagID);
+}
+
+
 //===----------------------------------------------------------------------===//
 // Trigraph and Escaped Newline Handling Code.
 //===----------------------------------------------------------------------===//
@@ -1148,9 +1153,7 @@
 
   // If we are in a #if directive, emit an error.
   while (!ConditionalStack.empty()) {
-    PreprocessorLexer::Diag(ConditionalStack.back().IfLoc,
-                            diag::err_pp_unterminated_conditional);
-    
+    Diag(ConditionalStack.back().IfLoc, diag::err_pp_unterminated_conditional);
     ConditionalStack.pop_back();
   }