Date: 2009-06-29 19:16:29 +0000 (Mon, 29 Jun 2009)
Don't create ellipses/arcs/circles that have a zero x or y dimension. When snapping for example to the same point twice then just cancel the arc creation (Fixes bug #375975). And while we're at it, make the ellipse tool escapeable by pressing esc. Needs to be copied to the rect / star / etc. tools too
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