(MDisplayInfo): New member altgr_mask. (find_modifier_bits): Set disp_info->altgr_mask.
(MDisplayInfo): New member altgr_mask.
(find_modifier_bits): Set disp_info->altgr_mask.

xmirror/m17n-lib,xmirror/m17n-lib,xmirror/m17n-lib,xmirror/m17n-lib