For blocks bigger than the CacheMax GetBlockRef returns an error

[ilucena]

The INGR driver is producing a GetBlockRef Error when reading CCITT4 compressed images that produce a block in memory larger than the CacheMax.

That is what I found:

The comment on that line: http://trac.osgeo.org/gdal/browser/trunk/gdal/gcore/gdalrasterblock.cpp?rev=13965#L379 says "don't flush this block!" but that is exactly what is happening 7 lines after that.

I made that change and the "GetBlockRef Error" problem with INGR, CCITT4 disappear:

        if (nLockCount == 0)
        {
            if (!GDALFlushCacheBlock())
            {
                eErr = CE_Failure;
                break;
            }
        }

The GDALFlushCacheBlock() was added my Even in 2/3/2008. I would suggest a revision.

Regards.

[warmerdam]

I would like to correct this before preparing 1.5.1 if practical.