C++ indenter: Fix function declaration continuation indent.

Change-Id: I0ebe1f0f531cb4830f80b80c6bb52caeaee01353
Reviewed-on: http://codereview.qt.nokia.com/1167
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>

src/plugins/cpptools/cppcodeformatter.h

@@ -278,6 +278,8 @@ protected:
     static bool shouldClearPaddingOnEnter(int state);
 
 private:
+    void addContinuationIndent(int *paddingDepth) const;
+
     TextEditor::TabSettings m_tabSettings;
     CppCodeStyleSettings m_styleSettings;
 };