fix "unreachable code" warning

There is unreachable code at several positions, e.g. after an
#if/#end, or after an endless loop.  Remove that.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7197 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/volume.c

@@ -510,7 +510,6 @@ int changeVolumeLevel(int fd, int change, int rel)
 		return changeSoftwareVolume(fd, change, rel);
 	default:
 		return 0;
-		break;
 	}
 }