Simon Rozman d9a719ddb8 Common: Require explicit handle validation
Using operator bool() hid ambiguity when handle was polymorfic with
bool. Using operator!() reqired !! to test for validity which results in
awkward code.

Signed-off-by: Simon Rozman <simon@rozman.si>
2025-06-09 22:39:06 +02:00
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