[PropertyAccess] fix error msg when accessing typed but uninitializer public properties

Author: nicolas-grekas

PropertyAccessor.php

@@ -470,7 +470,7 @@ private function readProperty(array $zval, string $property, bool $ignoreInvalid
                         throw $e;
                     }
                 } elseif (PropertyReadInfo::TYPE_PROPERTY === $type) {
-                    if (!method_exists($object, '__get') && !\array_key_exists($name, (array) $object)) {
+                    if (!method_exists($object, '__get') && !\array_key_exists($name, (array) $object) && !(new \ReflectionProperty($class, $name))->hasType()) {
                         throw new UninitializedPropertyException(sprintf('The property "%s::$%s" is not initialized.', $class, $name));
                     }