convert: Handle FooPtr->FooProxyPtr conversion.
convert: Handle FooPtr->FooProxyPtr conversion.

Problem only occured for 'direct' mode tests in which the client-side
object is directly the effective object type.

Change-Id: Id7aaa777c377e50906e02d585ac0ad780a42dd24
Reviewed-on: http://gerrit.aldebaran.lan:8080/17370
Reviewed-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>
Tested-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>

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