The pull request is still valid. I haven't forgotten, I'm just busy. It will miss 0.193, but it's unlikely there will be merge conflicts since I'm the only one who likes messing with that part of the code anyway.
I figured as much, with the holiday season combined with the 0.193 release.
I was merely curious as to how the process works, being new to this MAME development (I wrote some code for xmame in the distant past). Looking forward to 0.193 this week; keep up the good work!