Fix #391 for PHP 5.x

[sagebind]

An attempt at fixing #391 for PHP versions 5.x.

As per the pthreads 2.0.x docs, resources and objects should be nullified inside static variables, so now pthreads_copy_statics() skips over those types of values when copying lexical statics by simple type checking. The entry for the variable will instead be empty, which will return a fresh NULL after copy to a child thread. Normal zvals are copied and their refcounts incremented.

[krakjoe]

You need to omit copying arrays in the same way for this to work as intended.

Z_TYPE_P(* can be replaced with Z_TYPE_PP in 5

Also, add array case to test for completeness.

Thanks for taking the time ;)

[sagebind]

OK, will do. Thanks for the tip!

[krakjoe]

Excellent work, thanks again @CoderStephen

Sorry I can't find more time to work on the 5 branch, there are a couple of other outstanding issues, when seven is out the door, we'll try and get some of them cleared up for a final release on pecl for the 5 series.

[sagebind]

Glad I can help! Don't feel bad -- it sounds like you've got enough on your plate already.

The only reason I'm so eager for the 5 branch (:smile:) is because I'm simultaneously working on icicleio/concurrent to be 5.x compatible primarily. And I think we're doing some new, unique types of things with pthreads that uncover bugs no one else even noticed. I'm really looking forward to becoming 7 compatible too when pthreads 3 is released.