[Qgis-developer] Update datumTransformEntries on layerCrsChanged ?

[René-Luc Dhont]

Hi Dev,

One of our customer discovered a bug in the couple QGIS / QGIS-Server. 
He discovered that the element layer_coordinate_transform_info, child of 
mapcanvas element, was not updated after a layer CRS changed and project 
saved. This causes some troubles in QGIS-Server, because it uses this 
element to defined CRS transformation.

I proposed a Pull-Request https://github.com/qgis/QGIS/pull/1971
If my proposed patch is accepted, I propose to backport it to 2.8 for a 
2.8.2 version.

Thanks for review.

Regards,
René-Luc