fix: SA: Fix "might not be defined" rule.

SA stands for Static Analysis.

src/Bundle/ChillTaskBundle/Form/SingleTaskType.php

@@ -1,20 +1,7 @@
 <?php
-/*
- * Copyright (C) 2018 Champs Libres Cooperative <info@champs-libres.coop>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
+
+declare(strict_types=1);
+
 namespace Chill\TaskBundle\Form;
 
 use Chill\MainBundle\Security\Resolver\CenterResolverDispatcher;
@@ -48,6 +35,9 @@ class SingleTaskType extends AbstractType
 
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
+        $center = null;
+        $isScopeConcerned = false;
+
         if (NULL !== $task = $options['data']) {
             $center = $this->centerResolverDispatcher->resolveCenter($task);
             $isScopeConcerned = $this->scopeResolverDispatcher->isConcerned($task);
@@ -74,8 +64,7 @@ class SingleTaskType extends AbstractType
                 'required' => false
             ]);
 
-        if ($this->parameterBag->get('chill_main')['acl']['form_show_scopes']
-            && $isScopeConcerned) {
+        if ($isScopeConcerned && $this->parameterBag->get('chill_main')['acl']['form_show_scopes']) {
             $builder
                 ->add('circle', ScopePickerType::class, [
                     'center' => $center,