Silence gcc 3.4 warnings on ReactOS.  Mostly unused var warnings.  (patch 1015696)
diff --git a/src/mesa/shader/nvfragprog.h b/src/mesa/shader/nvfragprog.h
index ae26a7b..8f02f22 100644
--- a/src/mesa/shader/nvfragprog.h
+++ b/src/mesa/shader/nvfragprog.h
@@ -62,6 +62,7 @@
 
 /* Fragment program instruction opcodes */
 enum fp_opcode {
+   FP_OPCODE_INVALID = -1,   /* Force signed enum */
    FP_OPCODE_ABS = 1000,     /* ARB_f_p only */
    FP_OPCODE_ADD,
    FP_OPCODE_CMP,            /* ARB_f_p only */