mesa: fix out of bounds access in glGetFramebufferParameterivEXT

ColorDrawBuffer is an array of MAX_DRAW_BUFFERS == 8.

Found by Coverity.

Signed-off-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Fixes: 7534c536ca0 ("mesa: add EXT_dsa (Named)Framebuffer functions")
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6067>
1 file changed