crtools: fix a bug that log_level may not work

If we use -v [num] to set log_level and we happen to set it in the end of
arguments, the [num] we set may not work. This patch will fix it.
Signed-off-by: Huang Qiang <h.huangqiang@huawei.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

crtools.c

@@ -147,7 +147,7 @@ int main(int argc, char *argv[])
 				return -1;
 			break;
 		case 'v':
-			if (optind < argc - 1) {
+			if (optind < argc) {
 				char *opt = argv[optind];
 
 				if (isdigit(*opt)) {