UPDATE: According to inXile this fix will probably be incorporated into the next patch.
UPDATE2: This has been incorporated into patch 2.
Wasteland (the original) has a problem where it randomly freezes after playing for some time.
From the known issues FAQ:
The game freeze frequently.
o This is a heritage issue which may be circumvented by using only the keyboard to control the game.
In general, fixing legacy issues is a quasi-impossibility as the original is not buildable.
I'm not completely sure about what they mean by "not buildable", but frankly I would rather that inXile focus on T:ToN and Wasteland 2 than wasting resources on fixing legacy code from 25 years ago. However nothing prevents me from "wasting" resources on fixing 25 year old dos games. So I took it upon myself to localize and fix the issue.
The short version is this: find rom\DATA\WLA.BIN in your steamapps/GoG folder and open it in your favourite hex editor, go to offset 0E5E where it says "77 1F" and replace with "EB 1F". The long version below explains how I figured this out, and probably requires a good understanding of x86 assembler and the PC platform to read.