OGRSQLiteLayer::createFromSpatialiteInternal(): fix mem leaks in error code paths (Coverity 1074298 and 1074305)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26427 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_with_coverage