Fix potential double free in OGROSMLayer::AddFeature() (in case memory allocation failed in AddToArray()) (Coverity 1074120)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26429 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_travis_macosx