pidgin/pidgin

Add missing self-referential #include.

2020-11-20, Elliott Sales de Andrade
406ff566ad57
Add missing self-referential #include.

Fixes a function-without-prototype warning.

Testing Done:
Compile.

Reviewed at https://reviews.imfreedom.org/r/245/
i18n = import('i18n')
i18n.gettext('pidgin',
args : '--from-code=utf-8',
install : get_option('nls'),
)