fix to freeing self from net.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2775 c06c8d41-db1a-0410-9941-cceddc491573
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Spell staves (called "rods" in the game) are a totally different kind ofitems. They hold spells which you can cast without having to memorisethem first and without consuming food. You must wield a rod like aweapon in order to gain from its power. Rods can be invoked with the 'E'command while you are wielding them. They have a pool of magical energywhich regenerates rather quickly when you are wielding it (drawing fromyour own Magic), or at a much slower rate when it just sits in yourbackpack. Unlike other staves, rods are unsuited for physical combat.