id3: avoid divide by zero if no bitrate specified in header.

If variable bitrate the header may contain zero as bitrate, resulting
in a divide by zero fault.

diff --git a/src/plugins/id3/id3.c b/src/plugins/id3/id3.c
index b859899..80f88a0 100644 (file)
--- a/src/plugins/id3/id3.c
+++ b/src/plugins/id3/id3.c
@@ -570,7 +570,7 @@ found:
                 return r;
         }
 
-        if (!hdr.length)
+        if (!hdr.length && hdr.bitrate > 0)
             hdr.length =  (8 * (size - off)) / (1000 * hdr.bitrate);
     }