cogl_texture_get_data() copies using wrong width size.
cogl_texture_get_data() copies using wrong width size.

For sliced 2D textures, _cogl_texture_2d_sliced_get_data() uses the
bitmap width, instead of the rowstride, when memcpy()ing into the
dest buffer.

Signed-off-by: Robert Bragg <12e9293ec6b30c7fa8a0926af42807e929c1684f@linux.intel.com>

gcampax/cogl,gcampax/cogl,Distrotech/cogl,collects/cogl,Distrotech/cogl,collects/cogl,djdeath/cogl,djdeath/cogl,gcampax/cogl,djdeath/cogl,Distrotech/cogl,Distrotech/cogl,djdeath/cogl-android,gcampax/cogl,djdeath/cogl-android,djdeath/cogl-android,spatulasnout/cogl,spatulasnout/cogl