Url: fixed empty query [Closes #48]

Author: dg

src/Http/Url.php

@@ -348,7 +348,7 @@ public function getFragment()
 	public function getAbsoluteUrl()
 	{
 		return $this->getHostUrl() . $this->path
-			. ($this->query ? '?' . $this->getQuery() : '')
+			. (($tmp = $this->getQuery()) ? '?' . $tmp : '')
 			. ($this->fragment === '' ? '' : '#' . $this->fragment);
 	}
 

tests/Http/Url.query.phpt

@@ -59,3 +59,8 @@ Assert::same( array('arg' => 'value', 'arg2' => 'def'),  $url->getQueryParameter
 $url->setQueryParameter('arg2', NULL);
 Assert::same( NULL, $url->getQueryParameter('arg2') );
 Assert::same( array('arg' => 'value', 'arg2' => NULL),  $url->getQueryParameters() );
+
+
+$url = new Url('http://hostname/path?arg=value');
+$url->setQuery(array(NULL));
+Assert::same( 'http://hostname/path', $url->getAbsoluteUrl() );