fix uninitialised pointer in constructor
fix uninitialised pointer in constructor

Change-Id: I4a5301ea41ba460ded3f2b88674d7393fb856b2c
Reviewed-on: http://gerrit.aldebaran.lan:8080/2350
Reviewed-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>
Tested-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>

aldebaran/libqi-java,bsautron/libqi,aldebaran/libqi,aldebaran/libqi,aldebaran/libqi-java,aldebaran/libqi,vbarbaresi/libqi,aldebaran/libqi-java