cast to int for safety. grammar already does so this is just extre precaution.

Author: taylorotwell

src/Illuminate/Database/Query/Builder.php

@@ -2102,7 +2102,7 @@ public function limit($value)
         $property = $this->unions ? 'unionLimit' : 'limit';
 
         if ($value >= 0) {
-            $this->$property = $value;
+            $this->$property = (int) $value;
         }
 
         return $this;