FS-11223: [core] fix Crash when firefox sends only rtcp and not rtp candidates on video media

src/switch_core_media.c

@@ -9078,7 +9078,9 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_activate_rtp(switch_core_sessi
 					}
 
 
-					if (t_engine->ice_in.cands[t_engine->ice_in.chosen[1]][1].ready) {
+					if (t_engine->ice_in.cands[t_engine->ice_in.chosen[1]][1].ready && t_engine->ice_in.cands[t_engine->ice_in.chosen[0]][0].ready &&
+						!zstr(t_engine->ice_in.cands[t_engine->ice_in.chosen[1]][1].con_addr) && 
+						!zstr(t_engine->ice_in.cands[t_engine->ice_in.chosen[0]][0].con_addr)) {
 						if (t_engine->rtcp_mux > 0 && !strcmp(t_engine->ice_in.cands[t_engine->ice_in.chosen[1]][1].con_addr,
 															  t_engine->ice_in.cands[t_engine->ice_in.chosen[0]][0].con_addr) &&
 							t_engine->ice_in.cands[t_engine->ice_in.chosen[1]][1].con_port == t_engine->ice_in.cands[t_engine->ice_in.chosen[0]][0].con_port) {
@@ -9404,7 +9406,9 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_activate_rtp(switch_core_sessi
 					}
 
 
-					if (v_engine->ice_in.cands[v_engine->ice_in.chosen[1]][1].ready) {
+					if (v_engine->ice_in.cands[v_engine->ice_in.chosen[1]][1].ready && v_engine->ice_in.cands[v_engine->ice_in.chosen[0]][0].ready &&
+						!zstr(v_engine->ice_in.cands[v_engine->ice_in.chosen[1]][1].con_addr) && 
+						!zstr(v_engine->ice_in.cands[v_engine->ice_in.chosen[0]][0].con_addr)) {
 
 						if (v_engine->rtcp_mux > 0 && !strcmp(v_engine->ice_in.cands[v_engine->ice_in.chosen[1]][1].con_addr, v_engine->ice_in.cands[v_engine->ice_in.chosen[0]][0].con_addr)
 							&& v_engine->ice_in.cands[v_engine->ice_in.chosen[1]][1].con_port == v_engine->ice_in.cands[v_engine->ice_in.chosen[0]][0].con_port) {