Test fix for packages BD update

source/libublsettings-gtk3.c

@@ -242,6 +242,7 @@ config_str yon_packages_get_depends(enum YON_PACKAGES_DB_TYPE type, const char *
 
 void yon_packages_update(){
     if (packages_struct.packages_handle) alpm_release(packages_struct.packages_handle);
+    packages_struct.packages_handle=NULL;
     _yon_packages_get_db();
 }