Use new signature for message handler
Use new signature for message handler

The const char * argument got replaced by a QString one.

Change-Id: I7211669154b1f2108cd69efc7dc00cd159f7741b
Reviewed-by: Friedemann Kleint <1b9f2592239daaec4856ccc1cfb4d2d55b35fb71@nokia.com>

mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools