P2P: Fix possible NULL pointer dereference

Fix wpas_p2p_invite() to call p2p_set_own_pref_freq_list() after the
NULL check, to avoid NULL pointer dereference if P2P initialization were
to have failed or P2P module getting deinitialized.

Signed-off-by: Ayala Beker <ayala.beker@intel.com>

wpa_supplicant/p2p_supplicant.c

@@ -6770,11 +6770,12 @@ int wpas_p2p_invite(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
 				   pref_freq_list, &size);
 	if (res)
 		return res;
-	p2p_set_own_pref_freq_list(wpa_s->global->p2p, pref_freq_list, size);
 
 	if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
 		return -1;
 
+	p2p_set_own_pref_freq_list(wpa_s->global->p2p, pref_freq_list, size);
+
 	if (wpa_s->parent->conf->p2p_ignore_shared_freq &&
 	    no_pref_freq_given && pref_freq > 0 &&
 	    wpa_s->num_multichan_concurrent > 1 &&