bsd-users: fix strace

Hi!

Attached patch fixes an unlock bug in strace.
Catched by gcc due to an use of uninitialized variable.
Signed-off-by: NChristoph Egger <Christoph.Egger@amd.com>

--
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Karl-Hammerschmidt-Str. 34, 85609 Dornach b. Muenchen
Geschaeftsfuehrer: Thomas M. McCoy, Giuliano Meroni
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632

bsd-user/strace.c

@@ -36,7 +36,7 @@ print_execve(const struct syscallname *name,
     unlock_user(s, arg1, 0);
 
     for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) {
-        abi_ulong *arg_ptr, arg_addr, s_addr;
+        abi_ulong *arg_ptr, arg_addr;
 
         arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1);
         if (!arg_ptr)
@@ -47,7 +47,7 @@ print_execve(const struct syscallname *name,
             break;
         if ((s = lock_user_string(arg_addr))) {
             gemu_log("\"%s\",", s);
-            unlock_user(s, s_addr, 0);
+            unlock_user(s, arg_addr, 0);
         }
     }