Use default width/height to draw when there is no valid pressure/touch_major

I am playing around with AcerT232HL touch monitor. The touch screen
does not report PRESSURE nor TOUCH_MAJOR value. Lets have a default
width/height value for drawing in this case.

BUG=chromium:255049
TEST=mtplot works with AcerT232HL

Change-Id: I9577bc0ad3b56f39bc58ec9e64e86284eab7e336
Reviewed-on: https://gerrit.chromium.org/gerrit/60257
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Commit-Queue: Yufeng Shen <miletus@chromium.org>
Tested-by: Yufeng Shen <miletus@chromium.org>
1 file changed