Alter Makefile to force 32-bit compile

Alter Makefile to force 32-bit compile

The code is not 64-bit compliant, and crashes when run as 64-bit compile.
The first such crash already occurs when initializing, and could be traced
to a vasprintf in fopen_p. Presumably the list of variable arguments
cannot handle it that pointers and ints are not the same size.
Rather than trying to fix this (and leaving an unknown number of potential
other problems), we stick to 32-bit.