[deform-texture] Mark texture as dirty when needed
[deform-texture] Mark texture as dirty when needed

On allocation and when initialising the arrays, make sure the texture
gets marked as dirty so that the new values are calculated and uploaded
to the GPU.

pwithnall/mx,clutter-project/mx,clutter-project/mx,jonnylamb/mx,pwithnall/mx,jonnylamb/mx,pwithnall/mx,jonnylamb/mx,clutter-project/mx,jonnylamb/mx,pwithnall/mx,clutter-project/mx