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Simon Kelley
2c78b6db6c
It turns out that subtracting NULL from a pointer to turn it into an integer is not a good idea, because subtracting a NULL pointer is undefined behaviour in C. The correct way to do this is simply to cast the pointer to uintptr_t. The only fly in this ointment is that the C standard does not mandate support for uintptr_t. In practice, I doubt anyone is running dnsmasq on the long-dead architectures where this might be a problem. Thanks to Matthias Andree for the heads-up.