merge-file: master.XX.po does not override strings in document.XX.po

[D. Barbier]

Hello,

GNUmakefile.team contains this snippet:

 # Merge a file.
 # When the master compendium is present, its translations override
 # the translations from the PO file.
 # $(1) is the PO file to merge; $$$$pot is its POT.
 define merge-file
 $(if $(master), \
   po0=$1; \
   $(MSGCAT) --more-than=1 --use-first $1 $(master) > $1-tmp0.po; \

But this last line does not match the comment above, $1 and $(master)
have to be swapped.

Denis