* lisp/play/gamegrid.el (gamegrid-calculate-glyph-size): Use `frame-monitor-attributes' to get the frame attributes directly instead of iterating over `display-monitor-attributes-list'.
* lisp/play/gamegrid.el (gamegrid-calculate-glyph-size): Use `frame-monitor-attributes' to get the frame attributes directly instead of iterating over `display-monitor-attributes-list'.