C++: Jump to better location when function signature is updated.
C++: Jump to better location when function signature is updated.

This will allow using 'Follow Symbol' to jump back after the change.

Change-Id: I99fd3ebc63a2af58b12eee9d7055a4c2f249e97d
Reviewed-on: http://codereview.qt.nokia.com/4186
Reviewed-by: Leandro T. C. Melo <8f144cd741810d8c7b648cacf5b9b2f4e2ebcc1b@nokia.com>

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