libxl: slightly correct JSON generation of CPU policy

The "cpuid_empty" label is also (in principle; maybe only for rubbish
input) reachable in the "cpuid_only" case. Hence the label needs to live
ahead of the check of the variable.

Fixes: 5b80cecb74 ("libxl: introduce MSR data in libxl_cpuid_policy")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>

tools/libs/light/libxl_cpuid.c

@@ -710,10 +710,11 @@ parse_cpuid:
                     libxl__strdup(NOGC, libxl__json_object_get_string(r));
         }
     }
+
+cpuid_empty:
     if (cpuid_only)
         return 0;
 
-cpuid_empty:
     co = libxl__json_map_get("msr", o, JSON_ARRAY);
     if (!libxl__json_object_is_array(co))
         return ERROR_FAIL;