resize: Hitting esc doesn't abort a resize.

[KristianLyng]

So I have two monitors, one is some times showing the TV instead of PC. Windows spawn on it, I try to move them but miss-click. Two things strike me here:

1. I am using alt+click, but resize still wins because it's at the corner.
2. When I do notice what's going on (because the cursor is changed to a resize-cursor), I hit ESC and the resize operation finishes. But by then the window is already resized. Typical result: Tiny tiny window.

Expected behavior when hitting esc is that the resize is not committed.