FMSLogo Code

Add missing <userinput> tags to the KEYBOARDOFF example

Fix Bug #512; PORTREADARRAY no longer leaks memory.

Add some more test coverage for SETITEM

Add missing curly braces

Fix Bug #513; PORTWRITEARRAY no longer leaks memory.
This adds a missing gcref() to free non-INTEGER NODE which cnv_node_to_intnode may allocate.

Remove some redundant code in lportreadarray()
This was done to make the code more readable.

Replace "char rxchar[64]" with "char rxchar", since only one byte was used.
This was done to make the code more readable.

Reduce the scope of the "#ifndef WX_PURE" blocks so that more of FMSLogo is compiled for GNU/Linux
This doesn't add any useful functionality on GNU/Linux. It's mostly for testing.

Change PORTWRITEARRAYTEST.BADINPUT to not expect an error when given array of bad input.
This matches the resolution of Bug #515, which is that PORTWRITEARRAY should silently replace bad input with an ASCII space character.

Fix Bug #514; PORTWRITEARRAY now writes ' ' instead of random memory for non-int items in its array input

Throwing a bad input error risked compatibility problems. Writing NUL would break old text-based protocols that use COM communication. Writing an ASCII space seemed to be the safest way to ignore garbage input.