Zend: handle IS_REFERENCE in _zendi_try_convert_scalar_to_number()

[arshidkv12]

_zendi_try_convert_scalar_to_number() did not explicitly handle IS_REFERENCE operands, which could result in hitting the EMPTY_SWITCH_DEFAULT_CASE()` assertion when references reached the function.

#20873

[devnexen]

is your PR actually fixing this particular issue or is it the wrong one ? completely unrelated. Beside I m not even sure the change is correct (or needed more precisely) actually, looking at the bigger picture. nevermind, the issue is actually #20873 but then your change, while passing the assertion, now gives a zendmm leak.

[arshidkv12]

Sorry.. it is #20873. I will check the memory leak.

[arshidkv12]

Also fixes #20875.

[ndossche]

This looks wrong, I don't understand the trick with Z_EXTRA, and I believe handling references in _zendi_try_convert_scalar_to_number is wrong. Note that the root cause of the issue is that a reference ends up in a TMP, which is not allowed.