added Doctrine_Access::__isset() and Doctrine_Access::__unset() for complete support of magic method invocations

Doctrine/Access.php

@@ -59,12 +59,28 @@ abstract class Doctrine_Access implements ArrayAccess {
     public function __get($name) {
         return $this->get($name);
     }
+    /**
+     * __isset()
+     * 
+     * @param string $name
+     */
+    public function __isset($name) {
+        return $this->contains($name);
+    }
+    /**
+     * __unset()
+     * 
+     * @param string $name
+     */
+    public function __unset($name) {
+        return $this->remove($name);                               	
+    }
     /**
      * @param mixed $offset
      * @return boolean -- whether or not the data has a field $offset
      */
     public function offsetExists($offset) {
-        return (bool) isset($this->data[$offset]);
+        return $this->contains($offset);
     }
     /**
      * offsetGet -- an alias of get()

Doctrine/Record.php

@@ -751,12 +751,12 @@ abstract class Doctrine_Record extends Doctrine_Access implements Countable, Ite
         }
     }
     /**
-     * __isset
+     * contains
      *
      * @param string $name
      * @return boolean
      */
-    public function __isset($name) {
+    public function contains($name) {
         if(isset($this->data[$name]))
             return true;