Fix overflows in avifImageRGBToYUV()#2355
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Fix overflows when multiplying with rowBytes in avifImageRGBToYUV(), by storing the various uint32_t rowBytes fields in local variables of the size_t type. Then multiplications with the size_t rowBytes local variables will be done in size_t. Part of the fix to AOMediaCodec#2271.
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Fix overflows when multiplying with rowBytes in avifImageRGBToYUV(), by
storing the various uint32_t rowBytes fields in local variables of the
size_t type. Then multiplications with the size_t rowBytes local
variables will be done in size_t.
Part of the fix to #2271.