JSonDecoder: Fix invalid iterator dereference in integer parsing
JSonDecoder: Fix invalid iterator dereference in integer parsing

Change-Id: Id255fdb556dd0d520d46843bc41fcffc01985c00
Reviewed-on: http://gerrit.aldebaran.lan/27427
Reviewed-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>
Tested-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>

vbarbaresi/libqi,aldebaran/libqi,aldebaran/libqi,bsautron/libqi,aldebaran/libqi