Fuzz: fix DASSERT in FinalizeFrameDecoding
Fuzz: fix DASSERT in FinalizeFrameDecoding

Similar to recent fix, but for EC: upsampler takes care of mirroring,
so it should be fed with physical image size.

libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl