Initialize disasinfo->private_data, binutils does it and some disassemblers depend on it.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3993 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/dis-asm.h b/dis-asm.h
index 2f333a9..dbe1465 100644
--- a/dis-asm.h
+++ b/dis-asm.h
@@ -444,6 +444,7 @@
   (INFO).stream = (STREAM), \
   (INFO).symbols = NULL, \
   (INFO).num_symbols = 0, \
+  (INFO).private_data = NULL, \
   (INFO).buffer = NULL, \
   (INFO).buffer_vma = 0, \
   (INFO).buffer_length = 0, \