debugger: partial revert of 894febba to fix QStringList display

There was a case where "childtype" had to be used instead of "type".

src/plugins/debugger/gdb/gdbengine.h

@@ -368,6 +368,7 @@ private:
     void handleVarListChildrenHelper(const GdbMi &child,
         const WatchData &parent);
     void setWatchDataType(WatchData &data, const GdbMi &mi);
+    void setWatchDataDisplayedType(WatchData &data, const GdbMi &mi);
     void setLocals(const QList<GdbMi> &locals);
    
     bool startModeAllowsDumpers() const;