Added pnm.de.po to DISTFILES.

Henning Meier-Geinitz <henning@meier-geinitz.de>

ChangeLog

@@ -5,6 +5,7 @@
 	  They should be complete now.
 	* po/Makefile.in README: Made Makefile more intelligent. Targets
 	  are only updated if necessary. No manual copying necessary.
+	  Added pnm.de.po to DISTFILES.
 	* backend/mustek_usb.desc: New status: beta.
 	* README: Added description of --enable-translations.
 	* doc/sane.man: Added comment about translations.