Paginate fix (#212)

$per_page = 5 in return overwrites the passed value

Author: ascweb

src/IMAP/Query/Query.php

@@ -204,7 +204,7 @@ public function paginate($per_page = 5, $page = null, $page_name = 'imap_page'){
         $this->page = $page > $this->page ? $page : $this->page;
         $this->limit = $per_page;
 
-        return $this->get()->paginate($per_page = 5, $this->page, $page_name);
+        return $this->get()->paginate($per_page, $this->page, $page_name);
     }
 
     /**
@@ -432,4 +432,4 @@ public function setFetchFlags($fetch_flags) {
         $this->fetch_flags = $fetch_flags;
         return $this;
     }
-}
+}