Incorrect header file name is output in 'CCode' section of vapi file which was generated by valac with options: '-H' , '-h' and '--internal-vapi'.

STEPS TO REPRODUCE
-------------------
1) Create the following source code file:

-- test.vala --
private class Foo1 {
}

private class N1.Foo2 {
}

private class N1.N2.Foo3 {
}
----

2) Compile the code by valac with following options:

valac -H foo.h -h internal-foo.h --internal-vapi=foo.vapi -c test.vala


ACTUAL RESULTS
---------------
The internal vapi file 'foo.vapi' is generated, but 'CCode' section's file names in the file are incorrect.

The C header file name of the class N1.N2.Foo3 is
"internal-internal-internal-foo.h",
and the class N1.Foo2 is
"internal-internal-foo.h".

Only the class Foo1's C header file name is correct;
"internal-foo.h"


ADDITIONAL INFORMATION
-----------------------
I think that valac replace recursively the internal header file name by (public) header file name.
The recursive count seem to depend on namespace depth.
And this replacement process would be cause of this problem.

I tryed the following command which was changed the parameter of internal-header from "internal-foo.h" to "internal-bar.h" which was not contain the (public) header name keyword "foo.h".

valac -H foo.h -h internal-bar.h --internal-vapi=foo.vapi -c test.vala

In the result that internal header file names in the vapi file are correct.

I tryed valac versions 0.22.1 and 0.24.0, these were same result.