analog fix in Mixin*ReflectionExtensions

Author: staabm

src/Reflection/Mixin/MixinMethodsClassReflectionExtension.php

@@ -84,13 +84,11 @@ private function findMethod(ClassReflection $classReflection, string $methodName
 		}
 
 		$parentClass = $classReflection->getParentClass();
-		while ($parentClass !== null) {
+		if ($parentClass !== null) {
 			$method = $this->findMethod($parentClass, $methodName);
 			if ($method !== null) {
 				return $method;
 			}
-
-			$parentClass = $parentClass->getParentClass();
 		}
 
 		return null;

src/Reflection/Mixin/MixinPropertiesClassReflectionExtension.php

@@ -75,13 +75,11 @@ private function findProperty(ClassReflection $classReflection, string $property
 		}
 
 		$parentClass = $classReflection->getParentClass();
-		while ($parentClass !== null) {
+		if ($parentClass !== null) {
 			$property = $this->findProperty($parentClass, $propertyName);
 			if ($property !== null) {
 				return $property;
 			}
-
-			$parentClass = $parentClass->getParentClass();
 		}
 
 		return null;