imgcodec: gif: there are too many runtime warnings on accuracy test #27168
Description
System Information
OpenCV 4.x 42a1320
Ubuntu 24.04
gcc 13.3.0
Detailed description
After #27138 , there are too many runtime warnings on accuracy test .
I notice this problem on Ubuntu 24.04 at my PC.
And we can confirm then for macOS-ARM64, Windows10-x64.
https://github.com/opencv/opencv/actions/runs/14055710860/job/39436005460?pr=27138
[==========] Running 643 tests from 37 test cases.
[----------] Global test environment set-up.
[----------] 10 tests from Imgcodecs_Gif
[ RUN ] Imgcodecs_Gif.imwriteanimation_rgba
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.
[ WARN:0@0.010] global grfmt_gif.cpp:395 lzwDecode Too long LZW length in GIF.Steps to reproduce
./bin/opencv_test_imgcodecs
Issue submission checklist
- I report the issue, it's not a question
- I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
- I updated to the latest OpenCV version and the issue is still there
- There is reproducer code and related data files (videos, images, onnx, etc)