lcc: align stack items to word boundaries

[kervinck]

The C data stack typically lives in $400..$5ff and can therefore cross a page boundary. If an int-sized variable or function argument happens to be split over these pages, accessing it with DEEK/DOKE will give the wrong result because these instructions wrap around the page. This can be prevented by aligning int-sized variables to 2-byte boundaries.

[kervinck]

Low priority

[lb3361]

Suggesting to close this issue since glcc handles stack alignment in a finer way.