scripts: access-portal: Fix incorrect bitmask checking for media roles
In Lua, 0 is a truthy value, which means not 0 is false. Compare
the resulting value from bitwise AND with 0 instead of checking it with
if not to ensure correctness.
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In Lua, 0 is a truthy value, which means not 0 is false. Compare
the resulting value from bitwise AND with 0 instead of checking it with
if not to ensure correctness.