[PATCH] MAX_LENGTH_OF_LONG, and possible buffer overflows

Hi there,

OK, so overflows aren't very likely with MAX_LENGTH_OF_LONG set to 20, but I
found 3 places I think you'll want to change. :-)

Also, can MAX_LENGTH_OF_LONG be changed to be accurate on 32-bit platforms?
Is setting it to (sizeof(long) > 4 ? 20 : 11) acceptable? If
MAX_LENGTH_OF_LONG is truely accurate, I can use it to optimize
is_numeric_string|unicode (and zend_u_strtod() too I think if it's not
otherwise rewritten), and it saves a few bytes of memory on 32-bit systems.
;-)

http://realplain.com/php/MAX_LENGTH_OF_LONG.diff
http://realplain.com/php/MAX_LENGTH_OF_LONG_5_2.diff

Thanks,
Matt