videoconvert: fix passthrough on equivalent transfer
When the input info and output info are equal, except for the transfer functions that are not equivalent, we need to set up a converter as we won't be passthrough.
Fixes an assertion in that case.
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When the input info and output info are equal, except for the transfer functions that are not equivalent, we need to set up a converter as we won't be passthrough.
Fixes an assertion in that case.