Use NULL instead of 0 for function pointers.

modules_s/nathelper/nathelper.c

@@ -338,22 +338,22 @@ static struct rtpp_head rtpp_list;
 static int rtpp_node_count = 0;
 
 static cmd_export_t cmds[] = {
-	{"fix_nated_contact",  fix_nated_contact_f,    0, 0,             REQUEST_ROUTE | ONREPLY_ROUTE },
+	{"fix_nated_contact",  fix_nated_contact_f,    0, NULL,             REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"fix_nated_sdp",      fix_nated_sdp_f,        1, fixup_int_1, REQUEST_ROUTE | ONREPLY_ROUTE | FAILURE_ROUTE },
-	{"unforce_rtp_proxy",  unforce_rtp_proxy0_f,   0, 0,             REQUEST_ROUTE | ONREPLY_ROUTE | FAILURE_ROUTE },
+	{"unforce_rtp_proxy",  unforce_rtp_proxy0_f,   0, NULL,             REQUEST_ROUTE | ONREPLY_ROUTE | FAILURE_ROUTE },
 	{"unforce_rtp_proxy",  unforce_rtp_proxy1_f,   1, fixup_var_str_1,   REQUEST_ROUTE | ONREPLY_ROUTE | FAILURE_ROUTE },
-	{"force_rtp_proxy",    force_rtp_proxy1_f,     0, 0,             REQUEST_ROUTE | ONREPLY_ROUTE },
+	{"force_rtp_proxy",    force_rtp_proxy1_f,     0, NULL,             REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"force_rtp_proxy",    force_rtp_proxy1_f,     1, fixup_var_str_1,             REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"force_rtp_proxy",    force_rtp_proxy2_f,     2, fixup_var_str_12,            REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"nat_uac_test",       nat_uac_test_f,         1, fixup_int_1, REQUEST_ROUTE | ONREPLY_ROUTE | FAILURE_ROUTE },
-	{"fix_nated_register", fix_nated_register_f,   0, 0,             REQUEST_ROUTE },
+	{"fix_nated_register", fix_nated_register_f,   0, NULL,             REQUEST_ROUTE },
 	{"ping_contact",       ping_contact_f,         1, fixup_ping_contact,  REQUEST_ROUTE },
-	{"start_recording",    start_recording0_f,     0, 0,             REQUEST_ROUTE | ONREPLY_ROUTE },
+	{"start_recording",    start_recording0_f,     0, NULL,             REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"start_recording",    start_recording1_f,     1, fixup_var_str_1,   REQUEST_ROUTE | ONREPLY_ROUTE },
-	{"rtpproxy_offer",     rtpproxy_offer1_f,      0, 0,             REQUEST_ROUTE | ONREPLY_ROUTE },
+	{"rtpproxy_offer",     rtpproxy_offer1_f,      0, NULL,             REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"rtpproxy_offer",     rtpproxy_offer1_f,      1, fixup_var_str_1,             REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"rtpproxy_offer",     rtpproxy_offer2_f,      2, fixup_var_str_12,            REQUEST_ROUTE | ONREPLY_ROUTE },
-	{"rtpproxy_answer",    rtpproxy_answer1_f,     0, 0,             REQUEST_ROUTE | ONREPLY_ROUTE },
+	{"rtpproxy_answer",    rtpproxy_answer1_f,     0, NULL,             REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"rtpproxy_answer",    rtpproxy_answer1_f,     1, fixup_var_str_1,             REQUEST_ROUTE | ONREPLY_ROUTE },
 	{"rtpproxy_answer",    rtpproxy_answer2_f,     2, fixup_var_str_12,            REQUEST_ROUTE | ONREPLY_ROUTE },
 	{0, 0, 0, 0, 0}