[gtkmm] Make fails with missing target

[Leslie Polzer <webmaster nachtwind net>]

Greetings,

I just checked out the latest devel CVS, but am not able to compile it:

sky@/usr/src/CVS/gtkmm2/glib/glibmm/private$ make
make: *** No rule to make target `convert_p.h', needed by `all-am'.  Stop.

(I did this to shorten the error messages generated by make, but the important
stuff is all there).

What's wrong with that?

Leslie