[dwm] [dvtm, patch] Locking the screen.

Hi to all dvtm users,
   i wrote a little'n simple routine which allow to lock the screen
until a passphrase has been inserted. It's doesn't deal with encrypted
key (that's because i don't need it; it's quite easy to implement, btw).
I hope someone else (other than me) will found it useful too.

In the attached patch i also removed the draw() function which is unused
at all.

Hope this help.

-- 
Claudio M. Alessi
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Version: 3.1
GCS/MU d-@ s: a--> C++(+++) UB++>$ P+> !L E--- W++(+++)
N+@ o--> K? w+@> O-@> M- V? PS+@ PE+@ Y+ PGP> t(-)@ 5?
X+ R? tv-- b+> DI-- D? G e+@> h--@> r y*
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