Do not attempt to read 0 bytes when manually iterating over a non-seekable file #25804
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This makes sure that when fseek fails and we iterate over a file with fread in order to get to the requested chunk, the manual seek doesn't error by trying to read 0 bytes when the expected from position is reached.
Should fix occurences of:
fread(): Length parameter must be greater than 0 at /var/www/nextcloud/lib/private/Files/View.php#460