xorg/app/xwd - Ansification and compile warning fixes

[Frank Groeneveld]

Hello,

Can somebody please have a look at
https://bugs.freedesktop.org/show_bug.cgi?id=15062 and apply the
attached patch if it's valid. I updated the original patch to work
with current xwd from git. Furthermore I replaced most tabs with 4
spaces and removed spaces in front of ;
This is my first xorg patch, so please be gentile ;)

Regards,
Frank Groeneveld