In commit 9e9fcf5 (glamor: Add a helper function for the common
GL_QUADS fallback pattern.), the glDrawArrays count change was
accidentally changed to nbox.
Fixes xlogo with MESA_GL_VERSION_OVERRIDE=2.1 and
MESA_GLSL_VERSION_OVERRIDE=120
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Reviewed-by: Eric Anholt <eric@anholt.net>