[Gimp-docs] Rules to make target `xml/stamp-en-valid'?

[Kolbjørn Stuestøl]

When trying to run 'make ALL_LINGUAS="no"' (or whatever language), I get 
the message:
    "make: *** No rule to make target `xml/stamp-no-valid', needed by 
`validate'.  Stop."
I assume I've missed a file or something, but where and what? Where do I 
find this rule, or more precisely: what do I have to do to get the 
program running as nicely as before?
Yes, I have updated the 'gimp-help-2' directory and run the 'make' on a 
copy of this.

I have tried to figure out where this message is generated without any luck.
Using Cygwin on Windows XP if that matter.
Kolbjoern