hterm: fix thinko in getCursorRow
hterm: fix thinko in getCursorRow

This func shouldn't take any arguments, and the one that's declared
isn't actually used, so trim it.

Change-Id: I9d2386ace3b1d24442a3ab0c668cab2678df3fbb
Reviewed-on: https://chromium-review.googlesource.com/484005
Reviewed-by: Brandon Gilmore <adbfbaf7e4f927b45ce8ad3e5043a632414a833b@google.com>
Tested-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

chromium/hterm,chromium/hterm,chromium/hterm,chromium/hterm