Test a few error cases when using TILING_SCHEME

git-svn-id: https://svn.osgeo.org/gdal/trunk@28113 f0d54148-0727-0410-94bb-9a71ac55c965
Add alternate accepted checksums for WEBP tests

git-svn-id: https://svn.osgeo.org/gdal/trunk@28114 f0d54148-0727-0410-94bb-9a71ac55c965
GPKG: fix for non-debug builds. Side effect should never go inside CPLAssert()...

git-svn-id: https://svn.osgeo.org/gdal/trunk@28115 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_travis_macosx