lockdown: Plug small memory leak
lockdown: Plug small memory leak

Credit to Rudolf Tammekivi (Blefish), see issue #599

Tatsh/libimobiledevice,libimobiledevice/libimobiledevice,libimobiledevice-win32/libimobiledevice,libimobiledevice-win32/libimobiledevice,libimobiledevice-win32/libimobiledevice,Tatsh/libimobiledevice,Tatsh/libimobiledevice,libimobiledevice/libimobiledevice,Tatsh/libimobiledevice,libimobiledevice-win32/libimobiledevice