Gloopcaster's Reflection displays same mishap message as Scribe's Reflection when no iota is stored in internal focus

[TinyDeskEngineer06]

When using Gloopcaster's Reflection when the casting Gloopifact does not store an iota, it causes a mishap, and displays the message "Gloopcaster's Reflection needs a place to read iotas from in the other hand but got 1x [Gloopifact]" This is both inconsistent with the behavior of Scribe's Reflection in that reading an unwritten Focus would result in NULL instead of a mishap, and is also potentially misleading, as Gloopcaster's Reflection is not attempting to read iotas from the item stack in the opposite hand in the first place.