patch taken from redhat

Index: libvorbis-1.2.0/lib/codebook.c
===================================================================
--- libvorbis-1.2.0/lib/codebook.c	(revision 14601)
+++ libvorbis-1.2.0/lib/codebook.c	(revision 14602)
@@ -225,7 +225,7 @@
       int quantvals=0;
       switch(s->maptype){
       case 1:
-	quantvals=_book_maptype1_quantvals(s);
+	quantvals=(s->dim==0?0:_book_maptype1_quantvals(s));
 	break;
       case 2:
 	quantvals=s->entries*s->dim;