Use all but last track to find offset.

Fixes problems for people whose reader doesn't do overread on the
last track.

morituri/rip/offset.py

@@ -170,8 +170,9 @@ CD in the AccurateRip database."""
                     'Offset of device is likely %d, confirming ...\n' %
                         offset)
 
-                # now try and rip all other tracks as well
-                for track in range(2, len(table.tracks) + 1):
+                # now try and rip all other tracks as well, except for the
+                # last one (to avoid readers that can't do overread
+                for track in range(2, (len(table.tracks) + 1) - 1):
                     try:
                         archecksum = self._arcs(runner, table, track, offset)
                     except task.TaskException, e: