Leaflet/Leaflet — pull request #3052 by kshepard (2014-11-21 23:17:31+00:00)
Title: Initialize _sizeChanged to true to prevent async map initialization issues

When asynchronously initializing a map, the series of events can
create a scenario where _size is incorrectly initialized, and
therefore calls to getSize will not cause a new value to be generated.

This fix sets _sizeChanged to true upon map initialization, which
allows the following first call to getSize to work properly.

Closes #3031