Stylistic fixes to sha1_file.c
Stylistic fixes to sha1_file.c

This fixes stylistic problems and one unused variable spotted by
Petr Baudis.  The buf variable unused in prepare_alt_odb() is
gone and the "creepy" function is more heavily documented.

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

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