Adding full support for these in expressions seems hard to do without
introducing conflicts into the parser grammar, but in fact all reported
cases have had parentheses around the comparison and we can support that
with a few restrictions on the left side of `<`.
Fixes#80 and #635. Also https://sourceforge.net/p/swig/bugs/1139/
This function doesn't do anything currently so these missing calls are a
latent issue. It could be used for e.g. memory leak checking in the
future though, and it's potentially a useful place to add code when
debugging.
Leave PHP5 wrapping them as integers as this change could cause
incompatibilities.
Fixes issue https://github.com/swig/swig/issues/686 noted by Nishant
Gupta.
