Merge pull request #179 from td204/2.2.0-fixAlterCanInclude

response was array, need to check boolean value

src/Extensions/GoogleSitemapExtension.php

@@ -66,6 +66,10 @@ class GoogleSitemapExtension extends DataExtension
             }
         }
 
+        if (is_array($can) && isset($can[0])) {
+            return $can[0];
+        }
+
         return $can;
     }
 

src/Extensions/GoogleSitemapSiteTreeExtension.php

@@ -104,6 +104,10 @@ class GoogleSitemapSiteTreeExtension extends GoogleSitemapExtension
         $result = parent::canIncludeInGoogleSitemap();
         $result = ($this->owner instanceof ErrorPage) ? false : $result;
 
+        if (is_array($result) && isset($result[0])) {
+            return $result[0];
+        }
+
         return $result;
     }