dwm picom added

dwm/picom/src/uthash_extra.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <uthash.h>
+
+#define HASH_ITER2(head, el)                                                             \
+	for (__typeof__(head) el = (head), __tmp = el != NULL ? el->hh.next : NULL;      \
+	     el != NULL; el = __tmp, __tmp = el != NULL ? el->hh.next : NULL)