Resurrect gluploadtexture i965
Since commit 32bf6f1e GLTextureUpload is broken because i965 doesn't report properly RGBA support. It could be possible to use RGBx but GLTextureUpload only regotiates RGBA.
The simplest fix to this regression is adding synthetically the RGBA format in the internal format map.
Fixes: #228 (closed)
Edited by Víctor Manuel Jáquez Leal