Fix up "git log --follow" a bit..
This fixes "git log --follow" to hopefully not leak memory any more, and also cleans it up a bit to look more like some of the other functions that use "diff_queued_diff" (by *not* using it directly as a global in the code, but by instead just taking a pointer to the diff queue and using that). As to "diff_queued_diff", I think it would be better off not as a global at all, but as being just an entry in the "struct diff_options" structure, but that's a separate issue, and there may be some subtle reason for why it's currently a global. Anyway, no real changes. Instead of having a magical first entry in the diff-queue, we now end up just keeping the diff-queue clean, and keeping our "preferred" file pairing in an internal "choice" variable. That makes it easy to switch the choice around when we find a better one. Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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