Fix restoring the geometry when recovering from an error. Just restore the

previous geometry, and don't do extra work to calculate the default geometry
so as to reset to that.

usr.sbin/vidcontrol/vidcontrol.c

@@ -171,9 +171,8 @@ revert(void)
 		else
 			ioctl(0, _IO('S', cur_info.video_mode_number), NULL);
 		if (cur_info.video_mode_info.vi_flags & V_INFO_GRAPHICS) {
-			size[0] = cur_info.video_mode_info.vi_width / 8;
-			size[1] = cur_info.video_mode_info.vi_height /
-			    cur_info.console_info.font_size;
+			size[0] = cur_info.console_info.mv_csz;
+			size[1] = cur_info.console_info.mv_rsz;
 			size[2] = cur_info.console_info.font_size;
 			ioctl(0, KDRASTER, size);
 		}