Explicit coerce to Maybe

Disclaimer, I'm extremely new to Haxe!

It seems "find" can't coerce its return value to a Maybe. Without this change I get this error:

/usr/lib/haxe/lib/goodies/0,2,1/goodies/Func.hx:282: characters 15-18 : find.S should be goodies.Maybe<find.S>

I'm using haxe 3.0.0 on a mac, compiling to flash.