Xpra: Ticket #250: review and fix/disable strict aliasing GCC warnings

Recent versions of GCC will print lots of scary warnings when building some of the Cython code:

And another dozen after that..

we should fix the warnings, preferably by making the compiler happy or if needed by adding f[no-]strict-aliasing where needed.

Fri, 08 Feb 2013 04:34:01 GMT - Antoine Martin: status changed; resolution set

dupe of #151

Sat, 23 Jan 2021 04:49:36 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/250