[PATCH] building fix - do not check unsigned var >= 0

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fix following build error by do not check unsigned op >= 0: 

  CC    x86_64-softmmu/tcg/tcg.o
cc1: warnings being treated as errors
/home/dave/git/qemu-kvm/tcg/tcg.c: In function âtcg_add_target_add_op_defsâ:
/home/dave/git/qemu-kvm/tcg/tcg.c:1030: error: comparison of unsigned expression >= 0 is always true
make[1]: *** [tcg/tcg.o] Error 1

Signed-off-by: Yang Ruirui <ruirui.r.yang@xxxxxxxxx>
Signed-off-by: Dave Young <hidave.darkstar@xxxxxxxxx>
---
 tcg/tcg.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- qemu-kvm.orig/tcg/tcg.c	2010-06-29 14:45:04.000000000 +0800
+++ qemu-kvm/tcg/tcg.c	2010-09-26 18:07:26.523339798 +0800
@@ -1027,7 +1027,7 @@ void tcg_add_target_add_op_defs(const TC
         if (tdefs->op == (TCGOpcode)-1)
             break;
         op = tdefs->op;
-        assert(op >= 0 && op < NB_OPS);
+        assert(op < NB_OPS);
         def = &tcg_op_defs[op];
 #if defined(CONFIG_DEBUG_TCG)
         /* Duplicate entry in op definitions? */
--
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