Convert function definitions to standard C.

Convert function definitions to standard C.
* lib-src/update-game-score.c: Convert function definitions to standard C.
* lib-src/sorted-doc.c:
* lib-src/profile.c:
* lib-src/pop.c:
* lib-src/movemail.c:
* lib-src/make-docfile.c:
* lib-src/hexl.c:
* lib-src/fakemail.c:
* lib-src/etags.c:
* lib-src/ebrowse.c:
* lib-src/digest-doc.c:
* lib-src/b2m.c: Likewise.