util: better fix for unused variable warnings with asserts
Modify the non-debug (ie disabled) version of assert to expose the value in the expression to the compiler (avoiding the unused variable messages) while still expanding to a noop.
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@ -188,7 +188,7 @@ void _debug_assert_fail(const char *expr,
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#ifdef DEBUG
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#define debug_assert(expr) ((expr) ? (void)0 : _debug_assert_fail(#expr, __FILE__, __LINE__, __FUNCTION__))
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#else
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#define debug_assert(expr) ((void)0)
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#define debug_assert(expr) do { } while (0 && (expr))
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#endif
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