motion-test: do not use getopt()

It is not available on all systems and using argc/argv directly actually
makes the code simpler.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

libavcodec/motion-test.c

@@ -119,15 +119,9 @@ int main(int argc, char **argv)
     int flags[2] = { AV_CPU_FLAG_MMX, AV_CPU_FLAG_MMX2 };
     int flags_size = HAVE_MMX2 ? 2 : 1;
 
-    for(;;) {
-        c = getopt(argc, argv, "h");
-        if (c == -1)
-            break;
-        switch(c) {
-        case 'h':
-            help();
-            return 1;
-        }
+    if (argc > 1) {
+        help();
+        return 1;
     }
 
     printf("Libav motion test\n");