strict types fixes

Author: dg

src/Application/LinkGenerator.php

@@ -51,7 +51,7 @@ public function link($dest, array $params = [])
 		try {
 			$class = $this->presenterFactory ? $this->presenterFactory->getPresenterClass($presenter) : NULL;
 		} catch (InvalidPresenterException $e) {
-			throw new UI\InvalidLinkException($e->getMessage(), NULL, $e);
+			throw new UI\InvalidLinkException($e->getMessage(), 0, $e);
 		}
 
 		if (is_subclass_of($class, UI\Presenter::class)) {

src/Application/UI/Presenter.php

@@ -854,7 +854,7 @@ protected function createRequest($component, $destination, array $args, $mode)
 			try {
 				$presenterClass = $this->presenterFactory->getPresenterClass($presenter);
 			} catch (Application\InvalidPresenterException $e) {
-				throw new InvalidLinkException($e->getMessage(), NULL, $e);
+				throw new InvalidLinkException($e->getMessage(), 0, $e);
 			}
 		}