It's fine.

The idea that stuff you add shouldn't touch plant stems really isn't all that important in most cases. The general idea is that as organic matter decomposes it might affect the living plant if it's right next to the stem. In most cases that simply doesn't happen.

More to the point though, corn likes nitrogen and compost isn't particularly good at providing it. Compost is good at providing the micro nutrients and a little of the major nutrients, but that's it.

If your corn needs nitrogen, give it some.

If you want a synthetic then use some ammonium sulfate and if you want organic then use fish emulsion or soybean meal (if you have a grain mill nearby).

Thanks - I'm on my way to the Agway. :-)