Fix identification of weapons. Without this, you could e.g. take an

non-artefact uncursed blowgun off a kobold, wield it to know its curse status and type, auto-identify its pluses after using it for awhile, and an identify scroll would still see it as unidentified because the ISFLAG_KNOW_PROPERTIES flag wasn't set.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7459 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on November 17, 2008
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