Discovered by @aba-hollerer.
Mistake was introduced in b6b7dd5ad4
probably due to a wrong copy/paste.
First wasn't reproducible because I had `/receipts request on` and thus
win_print_outgoing_receipts() is used which has the correct
THEME_TEXT_ME.
Fixes https://github.com/profanity-im/profanity/issues/1441