Single tiled deflate compressed DNGs not decoded properly

[SimonSegerblomRex]

Short description

I just tried opening a DNG using deflate compression with only one tile. If fails miserably since tile_length is set to INT_MAX before reaching this if statement: https://github.com/Beep6581/RawTherapee/blob/2ce5b827c5fa39b2b5425303f79f28b78f3df4f4/rtengine/dcraw.cc#L10906

Steps to reproduce

1. Open the attached DNG (with the latest commit on dev)
2. Notice how you only get an image containing zeros since (since tile_offset, tile_length, and tile_width are messed up)

This is were things get messed up: https://github.com/Beep6581/RawTherapee/blob/2ce5b827c5fa39b2b5425303f79f28b78f3df4f4/rtengine/dcraw.cc#L6551-L6554

Followed by: https://github.com/Beep6581/RawTherapee/blob/2ce5b827c5fa39b2b5425303f79f28b78f3df4f4/rtengine/dcraw.cc#L7065-L7066

Expected behavior

The attached image should be decoded properly.

Additional information Version: 5.8-3139-g2ce5b827c Branch: dev Commit: 2ce5b827c Commit date: 2022-08-30 Compiler: cc 10.2.1 Processor: x86_64 System: Linux Bit depth: 64 bits Gtkmm: V3.24.2 Lensfun: V0.3.2.0 Build type: release Build flags: -std=c++11 -march=native -Werror=unused-label -Werror=delete-incomplete -fno-math-errno -Wno-attributes -Wall -Wuninitialized -Wcast-qual -Wno-deprecated-declarations -Wno-unused-result -Wunused-macros -fopenmp -Werror=unknown-pragmas -O3 -DNDEBUG -ftree-vectorize Link flags: -march=native OpenMP support: ON MMAP support: ON Build OS: Linux 5.10.0-16-amd64 x86_64 Build date: Mon, 05 Sep 2022 09:39:15 +0000 UTC Build epoch: 1662370755 Build UUID: