Build failure

[Andrew Goodbody]

/home/ag/src/dk6/core/libs/threadimageio/video/videothumbdecoder_p.cpp: 
In member function ‘bool 
Digikam::VideoThumbDecoder::Private::initializeVideo()’:
/home/ag/src/dk6/core/libs/threadimageio/video/videothumbdecoder_p.cpp:93:49: 
error: invalid conversion from ‘const AVCodec*’ to ‘AVCodec*’ [-fpermissive]
    93 |     pVideoCodec           = 
avcodec_find_decoder(pVideoCodecParameters->codec_id);
       | 
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       |                                                 |
       |                                                 const AVCodec*
make[2]: *** 
[core/libs/threadimageio/CMakeFiles/core_threadimageio_obj.dir/build.make:440: 
core/libs/threadimageio/CMakeFiles/core_threadimageio_obj.dir/video/videothumbdecoder_p.cpp.o] 
Error 1