Handle another case where we should use PTHLexer as an alternative to the normal Lexer.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59736 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Lex/PPMacroExpansion.cpp

@@ -119,6 +119,8 @@ bool Preprocessor::isNextPPTokenLParen() {
       IncludeStackInfo &Entry = IncludeMacroStack[i-1];
       if (Entry.TheLexer)
         Val = Entry.TheLexer->isNextPPTokenLParen();
+      else if (Entry.ThePTHLexer)
+        Val = Entry.ThePTHLexer->isNextPPTokenLParen();
       else
         Val = Entry.TheTokenLexer->isNextTokenLParen();
       
@@ -126,7 +128,7 @@ bool Preprocessor::isNextPPTokenLParen() {
         break;
       
       // Ran off the end of a source file?
-      if (Entry.TheLexer)
+      if (Entry.ThePPLexer)
         return false;
     }
   }