cs: Enable a couple of risky rules.

src/Bundle/ChillPersonBundle/migrations/Version20160422000000.php

@@ -36,7 +36,7 @@ class Version20160422000000 extends AbstractMigration
         }
 
         $this->abortIf(
-            sizeof($personWithTwoAddressWithSameValidFrom) != 0,
+            count($personWithTwoAddressWithSameValidFrom) != 0,
             'There exists some person with multiple adress with the same validFrom'
         );
     }