we need to initialize interface_max_connections  to 0, to indicate we have no open/possible interfaces for interfacePrintWithFD() (i.e. so we don't get a segfault when creating the db, or other potential problems)

git-svn-id: https://svn.musicpd.org/mpd/trunk@2434 09075e82-0dd4-0310-85a5-a0d7c8717e4f