builtin/apply.c: fix a memleak
builtin/apply.c: fix a memleak

oldlines is allocated earlier in the function and also freed on the
successful code path.

Signed-off-by: Stefan Beller <a7f3b1612c245dae606b3b9617b4f52187fddb65@google.com>
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