[OpenLayers-Trac] [OpenLayers] #882: JS error after using mousewheel without having moved the mouse before

[OpenLayers]

#882: JS error after using mousewheel without having moved the mouse before
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  Reporter:  openlayers          |       Owner:             
      Type:  bug                 |      Status:  new        
  Priority:  major               |   Milestone:  2.5 Release
 Component:  Handler.MouseWheel  |     Version:  2.4        
Resolution:                      |    Keywords:  review     
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Changes (by crschmidt):

  * keywords:  => review

Comment:

 If we don't have an xy after trying to get it from mousePosition, we
 should just take the center lat/lon of the map. With tests for the
 specific bad behavior -- note that the tests will not actually fail in IE,
 because this is a workaround for a FF bug.

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Ticket URL: <http://trac.openlayers.org/ticket/882#comment:1>
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