Issue #3507522 by jurgenhaas, anybody: Insert captcha widget even if placement is NULL

captcha.module

@@ -208,12 +208,11 @@ function captcha_form_alter(array &$form, FormStateInterface $form_state, $form_
         ];
 
         // Get placement in form and insert in form.
-        if ($captcha_placement = _captcha_get_captcha_placement($form_id, $form)) {
+        $captcha_placement = _captcha_get_captcha_placement($form_id, $form);
         $captchaService->insertCaptchaElement($form, $captcha_placement, $captcha_element);
       }
     }
   }
-  }
   // If the user has the "skip CAPTCHA" permission, check, if it should be
   // rendered in "administration_mode", which adds administrative informations
   // to the captcha:
@@ -273,9 +272,8 @@ function captcha_form_alter(array &$form, FormStateInterface $form_state, $form_
       }
 
       // Get placement in form and insert in form.
-      if ($captcha_placement = _captcha_get_captcha_placement($form_id, $form)) {
+      $captcha_placement = _captcha_get_captcha_placement($form_id, $form);
       $captchaService->insertCaptchaElement($form, $captcha_placement, $captcha_element);
-      };
     }
     // If the user has the "skip Captcha" permission, but the
     // administration_mode is not enabled, simply do nothing and therefore