Assign the result of getCurrentFileLexer() to a PreprocessorLexer* instead of Lexer* (narrower interface).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59691 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/PPMacroExpansion.cpp b/lib/Lex/PPMacroExpansion.cpp
index 24a9b41..89885a7 100644
--- a/lib/Lex/PPMacroExpansion.cpp
+++ b/lib/Lex/PPMacroExpansion.cpp
@@ -510,7 +510,7 @@
     // Get the file that we are lexing out of.  If we're currently lexing from
     // a macro, dig into the include stack.
     const FileEntry *CurFile = 0;
-    Lexer *TheLexer = getCurrentFileLexer();
+    PreprocessorLexer *TheLexer = getCurrentFileLexer();
     
     if (TheLexer)
       CurFile = SourceMgr.getFileEntryForID(TheLexer->getFileID());