r300g: fix up the CS size of the rasterizer state

src/gallium/drivers/r300/r300_state.c

@@ -984,8 +984,8 @@ static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
     }
 
     UPDATE_STATE(state, r300->rs_state);
-    r300->rs_state.size = 25 + (r300->polygon_offset_enabled ? 5 : 0 +
-        r300->rws->get_value(r300->rws, R300_VID_DRM_2_3_0) ? 5 : 0);
+    r300->rs_state.size = 25 + (r300->polygon_offset_enabled ? 5 : 0) +
+        (r300->rws->get_value(r300->rws, R300_VID_DRM_2_3_0) ? 5 : 0);
 
     if (last_sprite_coord_enable != r300->sprite_coord_enable ||
         last_two_sided_color != r300->two_sided_color) {