Accept partial par2 file when no others are available.

sabnzbd/nzbstuff.py

@@ -889,8 +889,8 @@ class NzbObject(TryList):
                 head, vol, block = analyse_par2(fn)
                 ## Is a par2file and repair mode activated
                 if head and (self.repair or cfg.allow_streaming()):
-                    ## Skip if mini-par2 is not complete
-                    if not block and nzf.bytes_left:
+                    ## Skip if mini-par2 is not complete and there are more par2 files
+                    if not block and nzf.bytes_left and self.extrapars.get(head):
                         return
                     nzf.set_par2(head, vol, block)
                     ## Already got a parfile for this set?