git-am.sh: fix initialization of the threeway variable
Initialization for the threeway variable was missing. This caused a behavior change for command lines like: threeway=t git am ... This commit adds initialization for this variable. Signed-off-by: NRemi Lespinet <remi.lespinet@ensimag.grenoble-inp.fr> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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