Fix delayed subtraction on windowcount attr.
Fix delayed subtraction on windowcount attr.

FriendSoftwareLabs/friendup,FriendSoftwareLabs/friendup,FriendSoftwareLabs/friendup,FriendSoftwareLabs/friendup,FriendSoftwareLabs/friendup,FriendSoftwareLabs/friendup,FriendSoftwareLabs/friendup,FriendSoftwareLabs/friendup