[bug] grid.pos can become out of bounds after a save_cursor->resize->restore_cursor sequence

[ethanpailes]

The Grid struct can become malformed if a save_cursor (decsc) control code is issued when a terminal is large and the cursor is along the bottom or right of the screen, then the terminal is resized to a smaller size, and finally a restore_cursor (decrc) control code is issued. I've fixed this in my fork, and it would be nice to upstream the patch if possible (or address the issue in some other way).

My fix was to just clamp the position to the current edges of the screen if needed on restore.