Fix format security warning

[ScoreUnder]

Fixes build error with -Werror=format-security (default on arch linux):

view.c: In function ‘view_confirm’:
view.c:394:5: error: format not a string literal and no format arguments [-Werror=format-security]
  394 |     if (mvwprintw(w, STATUS_Y, STATUS_X, prompt) == OK)
      |     ^~
cc1: some warnings being treated as errors
make[2]: *** [Makefile:519: evjstest-view.o] Error 1