Set pixel store parameters before calling glGetTexImage
Set pixel store parameters before calling glGetTexImage

We need to set up the rowstride and alignment properly in
CoglTexture2D before reading texture data.

http://bugzilla.openedhand.com/show_bug.cgi?id=2036

Signed-off-by: Emmanuele Bassi <049ee2061f71220e5aaf33f5be422fc2a2b06a44@linux.intel.com>

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