Warper: fix shifted/aliased result with Lanczos resampling when XSCALE < 1 or YSCALE < 1 #11046
+335
−75
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Fixes #11042
and reduce execution time from 56 seconds to 36 seconds for
gdalwarp -s_srs EPSG:8353 -t_srs EPSG:3857 -r lanczos extracted2.tif tmp.tif -overwrite