fix crash in gtk chat

gtk/chat.c

@@ -61,12 +61,17 @@ void linphone_gtk_quit_chatroom(LinphoneChatRoom *cr) {
 	GtkWidget *nb=linphone_gtk_get_widget(main_window,"viewswitch");
 	GtkWidget *friendlist=linphone_gtk_get_widget(main_window,"contact_list");
 	GtkWidget *w=g_object_get_data(G_OBJECT(friendlist),"chatview");
+	gchar *from;
 	
 	g_return_if_fail(w!=NULL);
 	gtk_notebook_remove_page(GTK_NOTEBOOK(nb),gtk_notebook_page_num(GTK_NOTEBOOK(nb),w));
 	linphone_gtk_friend_list_update_chat_picture();
 	g_object_set_data(G_OBJECT(friendlist),"chatview",NULL);
-	g_object_set_data(G_OBJECT(w),"from_message",NULL);	
+	from=g_object_get_data(G_OBJECT(w),"from_message");
+	if (from){
+		g_object_set_data(G_OBJECT(w),"from_message",NULL);
+		g_free(from);
+	}
 	g_object_set_data(G_OBJECT(w),"cr",NULL);
 	g_object_set_data(G_OBJECT(friendlist),"from",NULL);
 	gtk_widget_destroy(w);
@@ -128,7 +133,7 @@ void linphone_gtk_push_text(GtkWidget *w, const LinphoneAddress *from,
 	GtkTextIter iter,begin;
 	int off;
 	char *from_str=linphone_address_as_string_uri_only(from);
-	char *from_message=(char *)g_object_get_data(G_OBJECT(w),"from_message");
+	gchar *from_message=(gchar *)g_object_get_data(G_OBJECT(w),"from_message");
 	GList *list=g_object_get_data(G_OBJECT(w),"list");
 	time_t t;
 	char buf[80];
@@ -148,8 +153,8 @@ void linphone_gtk_push_text(GtkWidget *w, const LinphoneAddress *from,
 		gtk_text_buffer_insert_with_tags_by_name(buffer,&iter," : ",-1,"bold",me ? "bg":NULL,NULL);
 		gtk_text_buffer_get_end_iter(buffer,&iter);
 		gtk_text_buffer_insert(buffer,&iter,"\n",-1);
-		ms_free(from_message);
-		g_object_set_data(G_OBJECT(w),"from_message",from_str);
+		g_free(from_message);
+		g_object_set_data(G_OBJECT(w),"from_message",g_strdup(from_str));
 	}
 	gtk_text_buffer_get_end_iter(buffer,&iter);
 	gtk_text_buffer_insert_with_tags_by_name(buffer,&iter,linphone_chat_message_get_text(msg),-1,"margin",me ? "bg":NULL,NULL);
@@ -193,6 +198,7 @@ void linphone_gtk_push_text(GtkWidget *w, const LinphoneAddress *from,
 	gtk_text_buffer_insert(buffer,&iter,"\n",-1);
 	GtkTextMark *mark=gtk_text_buffer_create_mark(buffer,NULL,&iter,FALSE);
 	gtk_text_view_scroll_mark_onscreen(text,mark); 
+	ms_free(from_str);
 }
 
 const LinphoneAddress* linphone_gtk_get_used_identity(){
@@ -292,6 +298,7 @@ void display_history_message(GtkWidget *chat_view,MSList *messages,const Linphon
 		MSList *it;
 		char *from_str;
 		char *with_str;
+		gchar *tmp;
 		for(it=messages;it!=NULL;it=it->next){
 			LinphoneChatMessage *msg=(LinphoneChatMessage *)it->data;
 			from_str=linphone_address_as_string_uri_only(linphone_chat_message_get_from(msg));
@@ -301,7 +308,11 @@ void display_history_message(GtkWidget *chat_view,MSList *messages,const Linphon
             						strcmp(from_str,with_str)==0? FALSE : TRUE,
 			                        linphone_chat_message_get_chat_room(msg),msg,TRUE);
 		}
-		g_object_set_data(G_OBJECT(chat_view),"from_message",NULL);
+		tmp=g_object_get_data(G_OBJECT(chat_view),"from_message");
+		if (tmp){
+			g_object_set_data(G_OBJECT(chat_view),"from_message",NULL);
+			g_free(tmp);
+		}
 		ms_free(from_str);
 		ms_free(with_str);
 		linphone_gtk_free_list(messages);
@@ -420,7 +431,7 @@ void linphone_gtk_load_chatroom(LinphoneChatRoom *cr,const LinphoneAddress *uri,
 		g_object_set_data(G_OBJECT(chat_view),"cr",cr);
 		g_object_set_data(G_OBJECT(linphone_gtk_get_widget(main_window,"contact_list")),"chatview",(gpointer)chat_view);
 		messages=linphone_chat_room_get_history(cr,NB_MSG_HIST);
-		g_object_set_data(G_OBJECT(chat_view),"from_message",uri_str);
+		g_object_set_data(G_OBJECT(chat_view),"from_message",g_strdup(uri_str));
 		display_history_message(chat_view,messages,uri);
 	}
 	ms_free(from_str);