i965: Resolve GCC sign-compare warning.
i965: Resolve GCC sign-compare warning.

mesa/src/mesa/drivers/dri/i965/brw_vs_surface_state.c: In function 'brw_upload_pull_constants':
mesa/src/mesa/drivers/dri/i965/brw_vs_surface_state.c:84:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (i = 0; i < prog_data->nr_pull_params; i++) {
                  ^
mesa/src/mesa/drivers/dri/i965/brw_vs_surface_state.c:89:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for (i = 0; i < ALIGN(prog_data->nr_pull_params, 4) / 4; i++) {
                     ^

Signed-off-by: Rhys Kidd <0b3b315d08353e2046d43a86d41e3fd1dff3d6ad@gmail.com>
Reviewed-by: Thomas Helland <ca565e508460f734dd9d29a6ab6bd7e0e3ccde1d@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler