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XOpenDisplay() in libW11 causes a SIGSEGV if called with NULL displayname.


This message is intended for the rxvt maintainer.

>From the manpage of XOpenDisplay():

display_name
Specifies the hardware display name, which determines the
display and communications domain to be used.  On a 
POSIX-conformant system, if the display_name is NULL, it 
defaults to the value of the DISPLAY environment variable.

Can this be fixed ? I'm not pushing but if I'm to use libW11 for the MC
package I'll need this working. Of course I can patch MC but I thought it 
may be worth libW11 to be fixed.


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