Memory Leak with OSR.SpatialReference

[jbeverage]

Running the following simple loop makes memory go through the roof even though Dispose is being called.

for (int i = 0; i < 1000000; ++i) {

using (SpatialReference? dst = new SpatialReference?("")) {

//Do something with SpatialReference? here

}

}

[tamas]

Applied the fix for the SVN trunk

[tamas]

Backported to branch 1.4