Fix multiple declarations issue with COLOR_ATTRIB
This fails compilation with GCC 10 or -fno-common in CFLAGS.
Link: https://bugs.gentoo.org/707418
[Desktop Entry]
Encoding=UTF-8
Type=Application
Name=MCabber
GenericName=Jabber IM Client
Comment=Console Jabber Client
Exec=mcabber
Terminal=true
Categories=ConsoleOnly;System;Network;InstantMessaging;Chat;