Infield Fly?

[bas2456]

This happened in my men's league softball game last night, but the situation could happen in any baseball game.

Runners on 1st and 2nd, one out. Batter hits a soft line drive right to the shortstop, who catches it easily for the out. Soft is the key word. After he made the play, I heard him say to his teammate "Oh man I should have dropped that on purpose".

Given that the infield fly rule is in place to prevent exactly that, would you have called that infield fly? I'll post what our umpire said after the game after I get some opinions from you all.