pidgin/pidgin

The vbox is already packed into PidginConversationWindow from glade, don't add it again.

Testing Done:
Compiled and ran locally, verified the `g_warning` message disappeared.

Reviewed at https://reviews.imfreedom.org/r/252/
i18n = import('i18n')
i18n.gettext('pidgin',
args : '--from-code=utf-8',
install : get_option('nls'),
)