[dwm] dmenu unused variable

In the latest dmenu tip I get:

dmenu.c: In function `setup':
dmenu.c:589: warning: unused variable `n'

Since n is only used for the xinerama stuff, and I don't compile
xinerama support, what do you think about moving int n into the #if
XINERAMA check?

-- 
James Turner
BSD Group Consulting
http://www.bsdgroup.org