cppeditor: fix crash on uninitialized pointer

Reviewed-by: Erik Verbruggen
(cherry picked from commit 769b21b49d)
Change-Id: I769b21b49d4072e426ac82271ba7797461ef86d3x
Reviewed-on: http://codereview.qt.nokia.com/391
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/cppeditor/cppquickfixes.cpp

@@ -138,7 +138,7 @@ private:
     public:
         Operation(const CppQuickFixState &state, int priority, BinaryExpressionAST *binary, Kind invertToken)
             : CppQuickFixOperation(state, priority)
-            , binary(binary)
+            , binary(binary), nested(0), negation(0)
         {
             Token tok;
             tok.f.kind = invertToken;