Add GDALRasterBand::ComputeRasterMinMax() method

[dron]

I would like to convert GDALComputeRasterMinMax() function into the wrapper around appropriate GDALRasterBand::ComputeRasterMinMax() method, just like it is done for GDALComputeRasterStatistics()/GDALRasterBand::ComputeStatistics() pair. It is much better to have the clean C++ API and not cast the GDALRasterBand pointer to GDALRasterBandH type for usage in GDALComputeRasterMinMax() function.

I am ready to do this change if there will be no objections.

Best regards, Andrey

[warmerdam]

Andrey,

It seems fine to me as long as the signature of the C function does not change. This should only be done in trunk though.

[dron]

I have made proposed changes with r13526 and r13527 revisions. GDALGetRasterSampleOverview() has been converted into GDALRasterBand class method in addition to GDALComputeRasterMinMax().

Best regards, Andrey

[dron]

This is just a test, please, ignore this comment.