10202 loader: use screen-#rows to find bottom left co-ordinates

Review Request #1359 — Created Jan. 9, 2019 and discarded Jan. 11, 2019, 12:21 p.m.

Description

10202 loader: use screen-#rows to find bottom left co-ordinates

Testing Done

-	7e94af5712fda9ca176f3469f75cd6af0dcf5ec3
+	bbbd0020b2024e956b51c64a5a612d2b53028967

	usr/src/boot/sys/boot/forth/menu.4th
	usr/src/boot/sys/boot/forth/screen.4th
	usr/src/boot/sys/boot/forth/support.4th
	usr/src/boot/sys/boot/forth/version.4th

-	bbbd0020b2024e956b51c64a5a612d2b53028967
+	14995711bcdd4775bd6168d4c98f3bea575cddc3

	usr/src/boot/sys/boot/forth/menu.4th
	usr/src/boot/sys/boot/forth/screen.4th
	usr/src/boot/sys/boot/forth/support.4th
	usr/src/boot/sys/boot/forth/version.4th

-	14995711bcdd4775bd6168d4c98f3bea575cddc3
+	b15638bdf0b927d218f413f47056039ad2af8a49

	usr/src/boot/sys/boot/forth/menu.4th
	usr/src/boot/sys/boot/forth/screen.4th
	usr/src/boot/sys/boot/forth/support.4th
	usr/src/boot/sys/boot/forth/version.4th

-	b15638bdf0b927d218f413f47056039ad2af8a49
+	f5ca1cb107e05d2ce220453f5c84e0b54fb4db5f

	usr/src/boot/sys/boot/forth/menu.4th
	usr/src/boot/sys/boot/forth/screen.4th
	usr/src/boot/sys/boot/forth/support.4th
	usr/src/boot/sys/boot/forth/version.4th

You have a pending review.