Prior to this fix, when a game is compiled with the -X flag, there would
be these complaints:

"infix.h", line 1169: Error:  Two different verb definitions refer to ";examine"
> Verb meta ';xo' ';examineo'
"infix.h", line 1171: Error:  Two different verb definitions refer to ";examine"
> Verb meta ';xs' ';examines'

Thanks to Andrew Plotkin for discovering this problem and solution.