[Libreoffice] Compilation failed with ct2n

Hello,

I've got this problem :
maryline@maryline:~/compile-libreoffice/libo$ make -r clean && make
********************************************************************
*
*   Running the post download checks.
*
********************************************************************
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
rm -rf */unxlngi6
rm -rf solver/*/unxlngi6
rm -rf install
********************************************************************
*
*   Running the post download checks.
*
********************************************************************
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
build -- version: 275224

Fetching dependencies for module NULL from solver... failed

ERROR: incomplete dependencies!

make: *** [all] Erreur 1


I put traces in solenv/bin/build.pl and found that the last module 
before NULL was ct2n (present in extensions/ct2n).
To be sure, i tried by removing --enable-ext-ct2n then the compilation 
starts normally.

Here is my autogen.lastrun :
--enable-ext-barcode
--enable-ext-diagram
--enable-ext-google-docs
--enable-ext-hunart
--enable-ext-lightproof
--enable-ext-nlpsolver
--enable-ext-ct2n
--enable-ext-numbertext
--enable-ext-oooblogger
--enable-ext-pdfimport
--enable-ext-presenter-console
--enable-ext-presenter-minimizer
--enable-ext-report-builder
--enable-ext-scripting-beanshell
--enable-ext-scripting-javascript
--enable-ext-scripting-python
--enable-ext-typo
--enable-ext-validator
--enable-ext-watch-window
--enable-ext-wiki-publisher
--enable-dbus
--enable-graphite
--enable-evolution2
--enable-werror
--enable-debug
--enable-dbgutil
--enable-crashdump
--enable-layout
--enable-kde4
--enable-binfilter
--enable-dependency-tracking
--enable-extra-gallery
--enable-extra-template
--enable-extra-sample
--enable-extra-font

Julien.