[Openais] proper fix for warning: dereferencing type-punned pointer will break strict-aliasing rules

[Steven Dake]

Guys
If you ever see this warning, it must be fixed _without_ typecasts.
Typecasts hide the problem but the c optimizer may still produce code
that doesn't match what one might expect.  This is the reason openais
segfaults on fedora core 5.

I have attached a patch which repairs some of the offending code.  I'm
not convinced we have all the strict aliasing problems addressed, since
-fwarn-strict-aliasing=2 dumps a ton of warnings about type punned
pointers.

Regards
-steve
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