Why is -Wstrict-null-sentinel (C++ only)?

[Chris Shoemaker <c.shoemaker@xxxxxxx>]

[ This was posted to gcc@xxxxxxxxxxx last week, but with no reply, so
I'm reposting here.  Any ideas? ] 

I want to warn at the use of unadorned "NULL" as sentinel value in C
programs.  Why is this option (-Wstrict-null-sentinel) restricted to
C++ programs?  Or is there some other way to get this warning?

-chris

(Please 'cc'; not subscribed)