qdev: Ignore Error objects where the return value suffices

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200707160613.848843-45-armbru@redhat.com>

hw/core/qdev-properties.c

@@ -742,7 +742,6 @@ static void set_pci_devfn(Object *obj, Visitor *v, const char *name,
     Property *prop = opaque;
     int32_t value, *ptr = qdev_get_prop_ptr(dev, prop);
     unsigned int slot, fn, n;
-    Error *local_err = NULL;
     char *str;
 
     if (dev->realized) {
@@ -750,9 +749,7 @@ static void set_pci_devfn(Object *obj, Visitor *v, const char *name,
         return;
     }
 
-    if (!visit_type_str(v, name, &str, &local_err)) {
-        error_free(local_err);
-        local_err = NULL;
+    if (!visit_type_str(v, name, &str, NULL)) {
         if (!visit_type_int32(v, name, &value, errp)) {
             return;
         }