iq: remove variable reinitialization

src/iq.c

@@ -1,4 +1,4 @@
-/* Copyright (c) 2019, Michael Santos <michael.santos@gmail.com>
+/* Copyright (c) 2019-2023, Michael Santos <michael.santos@gmail.com>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -20,8 +20,8 @@ int handle_iq(xmpp_conn_t *const conn, xmpp_stanza_t *const stanza,
   xmpp_stanza_t *slot;
   xmpp_stanza_t *item;
 
-  const char *from = NULL;
-  const char *to = NULL;
+  const char *from;
+  const char *to;
   const char *get = NULL;
   const char *put = NULL;