Prompt for a point-to-point IP if an IPv4 /32 address is entered

I am in the process of setting up some systems that are using a point-to-point ethernet connections, and came across this bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=694965

It made me think about whether the installer could be altered to prompt for a point-to-point IP if the IP address is entered as a /32? It makes sense to me because you can't have a gateway IP if you enter a /32 prefix length, so a point to point IP is the only thing that makes sense. I have tested that the attached patch compiles, but haven't looked at how to create a boot image to test and actual installation. I'm happy to do this if you think it's necessary, and if you're open the the idea behind this patch.