git-gc --auto: move threshold check to need_to_gc() function.
git-gc --auto: move threshold check to need_to_gc() function.

That is where we decide if we are going to run gc
automatically.

Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git