getthumbs size does not like the 120x120 setting

[things4fun]

The getthumbs function has an error when the size is set to 120x120.

Uncaught (in promise) Invariant Violation: size must be one of: "32x32", "120x120".

It seems to work just fine when the values are less. It is currently working for me at 110x110. Not a big deal, but a little confusing. Up to 116^2 worked for me, and 117-119 didn't work without error.