C++ preprocessor: Fix multiline tokens in ifdef'ed out blocks.

Change-Id: If6f9819565f891e861f9e111423d99caa7c0f7aa
Reviewed-on: http://codereview.qt.nokia.com/3884
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>

src/libs/cplusplus/pp-engine.h

@@ -180,6 +180,9 @@ private:
     QString string(const char *first, int len) const;
     bool maybeAfterComment() const;
 
+    bool maybeMultilineToken(TokenIterator tok);
+    void skipToNextLine();
+
 private:
     Client *client;
     Environment *env;