fix(core): avoid memory leaks

coreapi/event.c

@@ -420,6 +420,9 @@ static void linphone_event_destroy(LinphoneEvent *lev){
 	if (lev->ei) linphone_error_info_unref(lev->ei);
 	if (lev->op) sal_op_release(lev->op);
 	if (lev->send_custom_headers) sal_custom_header_free(lev->send_custom_headers);
+	if (lev->to_address) linphone_address_unref(lev->to_address);
+	if (lev->from_address) linphone_address_unref(lev->from_address);
+
 	ms_free(lev->name);
 }
 

coreapi/proxy.c

@@ -246,6 +246,9 @@ void _linphone_proxy_config_destroy(LinphoneProxyConfig *cfg){
 	if (cfg->ei){
 		linphone_error_info_unref(cfg->ei);
 	}
+
+	if (cfg->contact_address) linphone_address_unref(cfg->contact_address);
+
 	_linphone_proxy_config_release_ops(cfg);
 }