grim/purple-plugin-pack

Fix compile of ignorance plugin.
meson
2017-06-23, Elliott Sales de Andrade
2efc78d7b851
Fix compile of ignorance plugin.
if PIDGIN.found()
msglen = shared_module('msglen',
'msglen.c',
dependencies : [PIDGIN, GTK],
name_prefix : '',
install : true,
install_dir : PIDGIN_LIBDIR)
PP_PIDGIN_BUILD += 'msglen'
endif