move auto_midx calls to callers of sync_index
move auto_midx calls to callers of sync_index

In call cases, sync_index is now called from a loop.  It makes more
sense to have the callers run auto_midx after the loop now.

Signed-off-by: Brandon Low <a52c3838af000af4c7c0bc518c135eded66d273a@lostlogicx.com>

jbaber/bup,mhoeher/bup,ToxicFrog/bup,ToxicFrog/bup,tjanez/bup,gevaerts/bup,gevaerts/bup,apenwarr/bup,pombredanne/bup,pombredanne/bup,apenwarr/bup,gevaerts/bup,mhoeher/bup,mhoeher/bup,tjanez/bup,pombredanne/bup,ToxicFrog/bup,mhoeher/bup,mhoeher/bup,gevaerts/bup,jbaber/bup,jbaber/bup,gevaerts/bup,tjanez/bup,jbaber/bup,pombredanne/bup,jbaber/bup,ToxicFrog/bup,apenwarr/bup,apenwarr/bup,ToxicFrog/bup,pombredanne/bup,tjanez/bup,tjanez/bup,tjanez/bup,jbaber/bup,mhoeher/bup,pombredanne/bup