keep linphone_core_get_chat_room(LinphoneCore *lc, const LinphoneAddress *addr) with const param

coreapi/chat.c

@@ -342,10 +342,10 @@ LinphoneChatRoom * linphone_core_create_chat_room(LinphoneCore *lc, const char *
  * @param addr a linphone address.
  * @returns #LinphoneChatRoom where messaging can take place.
 **/
-LinphoneChatRoom *linphone_core_get_chat_room(LinphoneCore *lc, LinphoneAddress *addr){
+LinphoneChatRoom *linphone_core_get_chat_room(LinphoneCore *lc, const LinphoneAddress *addr){
     LinphoneChatRoom *ret = _linphone_core_get_chat_room(lc, addr);
     if (!ret) {
-        ret = _linphone_core_create_chat_room(lc, addr);
+        ret = _linphone_core_create_chat_room(lc, linphone_address_clone(addr));
     }
     return ret;
 }

coreapi/linphonecore.h

@@ -1374,7 +1374,7 @@ typedef void (*LinphoneChatMessageStateChangedCb)(LinphoneChatMessage* msg,Linph
 LINPHONE_PUBLIC void linphone_core_set_chat_database_path(LinphoneCore *lc, const char *path);
 LINPHONE_PUBLIC	LinphoneChatRoom * linphone_core_create_chat_room(LinphoneCore *lc, const char *to);
 LINPHONE_PUBLIC	LinphoneChatRoom * linphone_core_get_or_create_chat_room(LinphoneCore *lc, const char *to);
-LINPHONE_PUBLIC LinphoneChatRoom *linphone_core_get_chat_room(LinphoneCore *lc, LinphoneAddress *addr);
+LINPHONE_PUBLIC LinphoneChatRoom *linphone_core_get_chat_room(LinphoneCore *lc, const LinphoneAddress *addr);
 LINPHONE_PUBLIC LinphoneChatRoom *linphone_core_get_chat_room_from_uri(LinphoneCore *lc, const char *to);
 LINPHONE_PUBLIC void linphone_core_disable_chat(LinphoneCore *lc, LinphoneReason deny_reason);
 LINPHONE_PUBLIC void linphone_core_enable_chat(LinphoneCore *lc);

tester/message_tester.c

@@ -257,7 +257,7 @@ static void text_message_with_privacy(void) {
 	linphone_core_get_default_proxy(pauline->lc,&pauline_proxy);
 	linphone_proxy_config_set_privacy(pauline_proxy,LinphonePrivacyId);
 
-	CU_ASSERT_PTR_NULL(linphone_core_get_chat_room(marie->lc,pauline->identity));
+	CU_ASSERT_PTR_NOT_NULL(linphone_core_get_chat_room(marie->lc,pauline->identity));
 
 	linphone_chat_room_send_message(chat_room,"Bla bla bla bla");
 	CU_ASSERT_TRUE(wait_for(pauline->lc,marie->lc,&marie->stat.number_of_LinphoneMessageReceived,1));