Fix memory leak in external body url message test.

tester/liblinphone_tester.h

@@ -168,6 +168,7 @@ typedef struct _stats {
 	int number_of_LinphoneMessageDelivered;
 	int number_of_LinphoneMessageNotDelivered;
 	int number_of_LinphoneMessageFileTransferDone;
+	int number_of_LinphoneMessageFileTransferError;
 	int number_of_LinphoneMessageDeliveredToUser;
 	int number_of_LinphoneMessageDisplayed;
 	int number_of_LinphoneIsComposingActiveReceived;

tester/message_tester.c

@@ -190,6 +190,7 @@ void liblinphone_tester_chat_message_msg_state_changed(LinphoneChatMessage *msg,
 			return;
 		case LinphoneChatMessageStateFileTransferError:
 			counters->number_of_LinphoneMessageNotDelivered++;
+			counters->number_of_LinphoneMessageFileTransferError++;
 			return;
 		case LinphoneChatMessageStateFileTransferDone:
 			counters->number_of_LinphoneMessageFileTransferDone++;
@@ -698,10 +699,13 @@ static void file_transfer_using_external_body_url(void) {
 
 		BC_ASSERT_TRUE(wait_for(pauline->lc, marie->lc, &marie->stat.number_of_LinphoneMessageReceived, 1));
 		if (marie->stat.last_received_chat_message) {
+			cbs = linphone_chat_message_get_callbacks(marie->stat.last_received_chat_message);
+			linphone_chat_message_cbs_set_msg_state_changed(cbs, liblinphone_tester_chat_message_msg_state_changed);
 			linphone_chat_message_download_file(marie->stat.last_received_chat_message);
 		}
 		BC_ASSERT_TRUE(wait_for(pauline->lc, marie->lc, &marie->stat.number_of_LinphoneMessageExtBodyReceived, 1));
-		BC_ASSERT_TRUE(wait_for(pauline->lc, marie->lc, &pauline->stat.number_of_LinphoneMessageInProgress, 1));
+		BC_ASSERT_TRUE(wait_for(pauline->lc, marie->lc, &pauline->stat.number_of_LinphoneMessageDelivered, 1));
+		BC_ASSERT_TRUE(wait_for(pauline->lc, marie->lc, &marie->stat.number_of_LinphoneMessageFileTransferError, 1));
 		linphone_core_manager_destroy(pauline);
 		linphone_core_manager_destroy(marie);
 	}