add STATE_INTERNAL_DRIVER, etc (Rune Petersen)
diff --git a/src/mesa/shader/program.h b/src/mesa/shader/program.h
index a38a1a6..af06c03 100644
--- a/src/mesa/shader/program.h
+++ b/src/mesa/shader/program.h
@@ -189,7 +189,8 @@
    STATE_INTERNAL,		/* Mesa additions */
    STATE_NORMAL_SCALE,
    STATE_TEXRECT_SCALE,
-   STATE_POSITION_NORMALIZED    /* normalized light position */
+   STATE_POSITION_NORMALIZED,   /* normalized light position */
+   STATE_INTERNAL_DRIVER	/* first available state index for drivers (must be last) */
 };