Fix typo.


git-svn-id: svn://svn.valgrind.org/vex/trunk@2575 8f6e269a-dfd6-0310-a8e1-e2731360e62c
diff --git a/priv/host_s390_defs.c b/priv/host_s390_defs.c
index c66dcd4..95a1167 100644
--- a/priv/host_s390_defs.c
+++ b/priv/host_s390_defs.c
@@ -6861,7 +6861,7 @@
    }
 
  fail:
-   vpanic("s390_insn_cas_emit");
+   vpanic("s390_insn_cdas_emit");
 }