[libunwind] fix for x86 in hg repository

[Richard Henderson]

Some uninitialized fields in the common dwarf structure yield
spurrious errors.  

r~



diff -r 4442dd9a22b2 src/x86/init.h
--- a/src/x86/init.h    Tue Apr 25 12:04:52 2006 -0700
+++ b/src/x86/init.h    Fri May 05 12:18:29 2006 -0700
@@ -61,5 +61,8 @@ common_init (struct cursor *c)
   c->dwarf.ret_addr_column = 0;
   c->dwarf.pi_valid = 0;
   c->dwarf.pi_is_dynamic = 0;
+  c->dwarf.hint = 0;
+  c->dwarf.prev_rs = 0;
+
   return 0;
 }