Fix memory leak

b/11184427
b/11261713

Change-Id: Ie71675e4d60e1366cb042e9d0588762097925187
diff --git a/Tremolo/codebook.c b/Tremolo/codebook.c
index 6ef6b0e..781ea10 100644
--- a/Tremolo/codebook.c
+++ b/Tremolo/codebook.c
@@ -608,6 +608,7 @@
 
   if(oggpack_eop(opb))goto _eofout;
 
+  free(lengthlist);
   return 0;
  _errout:
  _eofout: