Change signature of ServerGroupChatRoomPrivate::update() method.

src/chat/chat-room/server-group-chat-room-p.h

@@ -41,7 +41,7 @@ public:
 
 	void subscribeReceived (LinphoneEvent *event);
 
-	void update (SalCallOp *op);
+	bool update (SalCallOp *op);
 
 	void setConferenceAddress (const IdentityAddress &conferenceAddress);
 	void setParticipantDevices (const IdentityAddress &addr, const std::list<IdentityAddress> &devices);

src/chat/chat-room/server-group-chat-room-stub.cpp

@@ -56,7 +56,7 @@ IdentityAddress ServerGroupChatRoomPrivate::generateConferenceAddress (const sha
 
 void ServerGroupChatRoomPrivate::subscribeReceived (LinphoneEvent *) {}
 
-void ServerGroupChatRoomPrivate::update (SalCallOp *) {}
+bool ServerGroupChatRoomPrivate::update (SalCallOp *) { return true; }
 
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