Fix for gcc 10 type conversion

Converted to byte first to remove error:

error: conversion from 'int' to non-scalar type
'std::variant<unsigned char>' requested |   299 |
std::variant<uint8_t> value = 0;

Tested: built with dunfell

Change-Id: Idfbf459bbf32dfb62857a84fd7ed0a21918b2d1c
Signed-off-by: James Feist <james.feist@linux.intel.com>
1 file changed