It needs giflib installed in it, I will add it in.
Mptaint1 was one of the first in the latest string of gtk1 apps, and I initially went with the naming similar to beaver and beaver2 in the tcz area. But being already an mtpaint, I used mtpaint1. After that , the -gtk1 suffix seemed more descriptive as mtpaint1 may seem to refer to the the version of mtpaint as being mtpaint 1.x.
If I have to rebuild mtpaint1, I will rename it like the rest.