metaobject: fix copy constructor
metaobject: fix copy constructor

Change-Id: I53fdf7b762c7ea535774c461b3bb4506d05c989d
Reviewed-on: http://gerrit.aldebaran.lan:8080/4785
Reviewed-by: llec <42f1a1c02cacc0f5b0188f0127ea77bedfdcf21a@aldebaran-robotics.com>
Tested-by: llec <42f1a1c02cacc0f5b0188f0127ea77bedfdcf21a@aldebaran-robotics.com>

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