Two consecutive menu separators with empty MRU

[Mike Nordell]

If your MRU (Most Recently Used [documents]) list is empty, at least in
Win32 it displays two consecutive menu separator lines. Not only is this
ugly, it's plain wrong. I have a fix for this in Win32
(ev_Win32Menu.cpp), but since I'm not using X I'm not sure if this is a
problem in X-windows also. If so, the fix would probably have to be
applied at a higher level than /win/.

I'd appreciate if someone using X could check this and reply.

/Mike