Fixed some bugs

+Fixed a "division by zero" error, in Battle.php
+Reworked spied informations, now they're shown only if the building is
at least at level 1. Splitted residence/palace information in two
distinct informations. Now the total crannies capacity is displayed
(even if the capacity is 0) instead of the level of the greatest cranny
+Fixed "getFieldLevelInVillage" function in Database.php
-Removed an useless control in Units.php

GameEngine/Units.php

@@ -367,8 +367,6 @@ class Units {
         if ( $data['u11'] < 0 ) {
             $form->addError( "error", "You can't send negative units." );
         }
-                
-        if($data['type'] < 1 || $data['type'] > 4) $form->addError("error", "Invalid attack type.");
         
         if($data['type'] != 1 && $post['spy'] != 0) $post['spy'] = 0;