fix compilation warning

gtk/chat.c

@@ -31,13 +31,11 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 #define CONFIG_FILE ".linphone-history.db"
 
-const char *linphone_gtk_message_storage_get_db_file(const char *filename){
+char *linphone_gtk_message_storage_get_db_file(const char *filename){
 	const int path_max=1024;
-	static char *db_file=NULL;
+	char *db_file=NULL;
 
-	if (db_file) return db_file;
-
-	db_file=(char *)malloc(path_max*sizeof(char));
+	db_file=(char *)g_malloc(path_max*sizeof(char));
 	if (filename==NULL) filename=CONFIG_FILE;
 	/*try accessing a local file first if exists*/
 	if (access(CONFIG_FILE,F_OK)==0){

gtk/linphone.h

@@ -100,7 +100,7 @@ LINPHONE_PUBLIC GtkWidget *linphone_gtk_create_window(const char *window_name, G
 LINPHONE_PUBLIC GtkWidget *linphone_gtk_get_widget(GtkWidget *window, const char *name);
 LINPHONE_PUBLIC GtkWidget *linphone_gtk_create_widget(const char* widget_name);
 
-const char *linphone_gtk_message_storage_get_db_file(const char *filename);
+char *linphone_gtk_message_storage_get_db_file(const char *filename);
 LINPHONE_PUBLIC void linphone_gtk_show_assistant(GtkWidget* parent);
 LINPHONE_PUBLIC void linphone_gtk_close_assistant(void);
 

gtk/main.c

@@ -2063,7 +2063,7 @@ int main(int argc, char *argv[]){
 	GdkPixbuf *pbuf;
 	const char *app_name="Linphone";
 	LpConfig *factory;
-	const char *db_file;
+	char *db_file;
 	GError *error=NULL;
 	const char *tmp;
 
@@ -2215,7 +2215,7 @@ core_start:
 
 	db_file=linphone_gtk_message_storage_get_db_file(NULL);
 	linphone_gtk_init_liblinphone(config_file, factory_config_file, db_file);
-	free(db_file);
+	g_free(db_file);
 
 	/* do not lower timeouts under 30 ms because it exhibits a bug on gtk+/win32, with cpu running 20% all the time...*/
 	gtk_timeout_add(30,(GtkFunction)linphone_gtk_iterate,(gpointer)linphone_gtk_get_core());