this should prevent hogs from hovering in air after using hammer

Hammer had been accessing dangling pointers under particular circumstances (e.g. when hitting a mine/barrel right when it exploded)

fix the fix

comment tweaks

tweak prev commit

Hammer changes/fixes: honor extra-damage (issue #975), round up damage, do correct damage when being spammed in infinite-attack mode

Fix weapon name - bug #967

HedgeEditor (bring on the bug reports, wahey!)