comment-out some unused code to silence warnings
diff --git a/src/mesa/shader/arbprogparse.c b/src/mesa/shader/arbprogparse.c
index ffb451d..b9bd1b0 100644
--- a/src/mesa/shader/arbprogparse.c
+++ b/src/mesa/shader/arbprogparse.c
@@ -2361,6 +2361,7 @@
    return 0;
 }
 
+#if 0 /* unused */
 /**
  * Handle the parsing out of a masked address register
  *
@@ -2387,7 +2388,7 @@
 
    return 0;
 }
-
+#endif
 
 /**
  * Parse out a swizzle mask.