[Swig-devel] Fix segv on x86_64 in php examples

[Olly B. <ol...@su...>]

"make check" in CVS HEAD segfaults on my x86_64 linux box in the
php4 "variables" example.  The problem is that some functions aren't
prototyped in one compilation unit, so they get default prototypes
which are incompatible with the correct prototypes.

I've attached a patch - with this applied the php4 examples all pass
"make check".

Cheers,
    Olly