userpref: Fix invalid plist_free() which caused pair process to fail
userpref: Fix invalid plist_free() which caused pair process to fail

patweb/libimobiledevice,libimobiledevice/libimobiledevice,libimobiledevice-win32/libimobiledevice,Tatsh/libimobiledevice,libimobiledevice/libimobiledevice,Tatsh/libimobiledevice,kalev/libimobiledevice,Tatsh/libimobiledevice,Tatsh/libimobiledevice,kalev/libimobiledevice,upbit/libimobiledevice,libimobiledevice-win32/libimobiledevice,kalev/libimobiledevice,libimobiledevice-win32/libimobiledevice,upbit/libimobiledevice,patweb/libimobiledevice,upbit/libimobiledevice,libimobiledevice-win32/libimobiledevice,patweb/libimobiledevice