Incorrect range computation in determine_dy_range (EstimateGammaArea) on ASC products

An assertion fails on ASC products:

Can be reproduced on:

SARGammaAreaImageEstimation -ram 16384 -distributearea True -indem 'TEST/tmp/S1/DEM+GEOID_s1a-iw-grd-20250218t174733-20250218t174758-057954-0726de.tiff' -indemproj 'TEST/tmp/S1/S1_on_DEM_s1a-iw-grd-20250218t174733-20250218t174758-057954-0726de.tiff' -indirectiondemc 1 -indirectiondeml -1 -inputwindow 'everything' -insar '/home/luc/dev/S1tiling/tests/20200306-NR/data_raw/S1A_IW_GRDH_1SDV_20250218T174733_20250218T174758_057954_0726DE_6110/measurement/s1a-iw-grd-vh-20250218t174733-20250218t174758-057954-0726de-002.tiff' -mlazi 1 -mlran 1 -streaming 'enable' -warn 'once' -innermarginratio 0.01 -innermarginratiostatus True -outermarginratio 0.04 -outermarginratiostatus True -out 'TEST/tmp/S1/GAMMA_AREA_s1a-iw-grd-20250218t174733-20250218t174758-057954-0726de.tiff'