Add missing newlines at end of error messages.

src/bin/scripts/common.c

src/bin/scripts/po/de.po

src/bin/scripts/po/es.po

src/bin/scripts/po/fr.po

src/bin/scripts/po/pt_BR.po

src/bin/scripts/po/ru.po

src/bin/scripts/po/sl.po

src/bin/scripts/po/tr.po

src/bin/scripts/po/zh_CN.po

src/bin/scripts/po/zh_TW.po