jorix/OL-DynamicMeasure — pull request #4 by pgiraud (2013-07-11 15:22:20+00:00)
Title: Elements (labels or lines) may not be displayed

When the map is panned, in some cases, lines or labels disapear while drawing.
Way to reproduce:
- load [measure dynamic example](http://jorix.github.io/OL-DynamicMeasure/examples/measure-dynamic.html),
- activate the measure length control,
- click on the map to add the first point,
- click-drag the map to pan so that the first point gets out of visible area,
- move the mouse cursor -> the line and the labels disapear.