Make qemu-img argument handling POSIX compliant

Signed-off-by: NHervé Poussineau <hpoussin@reactos.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6578 c046a42c-6fe2-441c-8c8c-71466251a162

qemu-img.c

@@ -865,7 +865,7 @@ int main(int argc, char **argv)
     if (argc < 2)
         help();
     cmd = argv[1];
-    optind++;
+    argc--; argv++;
     if (!strcmp(cmd, "create")) {
         img_create(argc, argv);
     } else if (!strcmp(cmd, "commit")) {