minor #58566 Reduce common control flows (alexandre-daubois)

This PR was merged into the 7.2 branch.

Discussion
----------

Reduce common control flows

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

Commits
-------

d71b4faa50 Reduce common control flows

Internal/Hydrator.php

@@ -260,17 +260,16 @@ public static function getPropertyScopes($class): array
                 continue;
             }
             $name = $property->name;
+            $readonlyScope = null;
 
             if (\ReflectionProperty::IS_PRIVATE & $flags) {
-                $readonlyScope = null;
                 if ($flags & \ReflectionProperty::IS_READONLY) {
                     $readonlyScope = $class;
                 }
                 $propertyScopes["\0$class\0$name"] = $propertyScopes[$name] = [$class, $name, $readonlyScope, $property];
 
                 continue;
             }
-            $readonlyScope = null;
             if ($flags & \ReflectionProperty::IS_READONLY) {
                 $readonlyScope = $property->class;
             }