Plus42 Equations, Preview Release

[Thomas Okken]

New update:

1. Fixed a couple of crashes involving deeply nested subroutine calls. Note that this does not affect Free42, even though Free42 has the deep RTN stack as well; these bugs were related to the changes needed to support directories.
2. In PRGM mode, when the program is not in the current directory (which you can tell by the triangular pointer to the current line being hollow instead of solid black), GTO .. now sets the current directory to the program's directory.
3. Regression in the equation parser: it should accept both period and comma as the decimal, and ignore flag 28, but it didn't. Fixed.
4. CATALOG now has a new OTHER section, which is where it shows unit and reference objects. Note that units were formerly shown in the REAL section, but that was a bit problematic, in that the REAL section is used for command entry menus where only real and string values are acceptable, like indirect addressing, and having other types show up there was annoying.