Fix inconsistent return points.

Author: derrabus

Crawler.php

@@ -1053,9 +1053,7 @@ private function relativize($xpath)
      */
     public function getNode($position)
     {
-        if (isset($this->nodes[$position])) {
-            return $this->nodes[$position];
-        }
+        return isset($this->nodes[$position]) ? $this->nodes[$position] : null;
     }
 
     /**
@@ -1115,7 +1113,7 @@ private function createDOMXPath(\DOMDocument $document, array $prefixes = [])
     /**
      * @param string $prefix
      *
-     * @return string
+     * @return string|null
      *
      * @throws \InvalidArgumentException
      */
@@ -1128,9 +1126,7 @@ private function discoverNamespace(\DOMXPath $domxpath, $prefix)
         // ask for one namespace, otherwise we'd get a collection with an item for each node
         $namespaces = $domxpath->query(sprintf('(//namespace::*[name()="%s"])[last()]', $this->defaultNamespacePrefix === $prefix ? '' : $prefix));
 
-        if ($node = $namespaces->item(0)) {
-            return $node->nodeValue;
-        }
+        return ($node = $namespaces->item(0)) ? $node->nodeValue : null;
     }
 
     /**

Field/FormField.php

@@ -72,9 +72,8 @@ public function getLabel()
         }
 
         $labels = $xpath->query('ancestor::label[1]', $this->node);
-        if ($labels->length > 0) {
-            return $labels->item(0);
-        }
+
+        return $labels->length > 0 ? $labels->item(0) : null;
     }
 
     /**