Fix warning: 110: initialization makes pointer from integer without a cast

This was passing a (d_kqfilter_t *)-1 as the kqfilter function pointer.
Fortunately there was no D_KQFILTER in d_flags, so this was harmless.

sys/dev/mly/mly.c

@@ -105,8 +105,7 @@ static struct cdevsw mly_cdevsw = {
     MLY_CDEV_MAJOR,
     nodump,
     nopsize,
-    0,
-    -1
+    0
 };
 
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