[Merkaartor] Patch: Don't snap to the road being moved

[Yves Goergen]

Little annoyance: When moving a road, it always snaps to itself. You
cannot really move a road exactly because it always snaps to itself.
This patch adds the road being moved to the no-snap list just like all
moved nodes are added. Only one line added.

-- 
Yves Goergen "LonelyPixel" <nospam.list at unclassified.de>
Visit my web laboratory at http://beta.unclassified.de
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