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aiff: fix handling of unknown odd-sized chunks [bug #286]

Odd-sized chunks have a padding byte that needs to be skipped.

--- a/src/aiff.c

+++ b/src/aiff.c

@@ -314,6 +314,8 @@

       lsx_readdw(ft, &chunksize);

       if (lsx_eof(ft))

         break;

+      /* account for padding after odd-sized chunks */

+      chunksize += chunksize & 1;

       /* Skip the chunk using lsx_readb() so we may read

          from a pipe */

       while (chunksize-- > 0) {