Fixed more PHPstan warnings.

src/Entity/Parts/Supplier.php

@@ -72,6 +72,7 @@ class Supplier extends AbstractCompany
     /**
      * @ORM\OneToMany(targetEntity="Supplier", mappedBy="parent")
      * @ORM\OrderBy({"name" = "ASC"})
+     * @var Collection
      */
     protected $children;
 

src/Repository/UserRepository.php

@@ -106,7 +106,7 @@ final class UserRepository extends NamedDBElementRepository implements PasswordU
     {
         if ($user instanceof User) {
             $user->setPassword($newEncodedPassword);
-            $this->getEntityManager()->flush($user);
+            $this->getEntityManager()->flush();
         }
     }
 }

src/Twig/LastUserExtension.php

@@ -30,6 +30,7 @@ use Twig\TwigFunction;
 
 class LastUserExtension extends AbstractExtension
 {
+    /** @var \App\Repository\LogEntryRepository */
     private $repo;
 
     public function __construct(EntityManagerInterface $em)

src/Validator/Constraints/UrlOrBuiltinValidator.php

@@ -74,7 +74,7 @@ class UrlOrBuiltinValidator extends UrlValidator
         //After the %PLACEHOLDER% comes a slash, so we can check if we have a placholder via explode
         $tmp = explode('/', $value);
         //Builtins must have a %PLACEHOLDER% construction
-        if (!empty($tmp) && \in_array($tmp[0], $constraint->allowed_placeholders, false)) {
+        if (\in_array($tmp[0], $constraint->allowed_placeholders, false)) {
             return;
         }