tests: camera.val should be an UVar.
tests: camera.val should be an UVar.

Fixes issue #3234.
Suggested by Matthieu Nottale.

	* share/urbi/test-suite.u (camera.val): Be an UVar.

urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi