packages.php: Check if _GET value is set before assuming a default.

Signed-off-by: Loui Chang <louipc.ist@gmail.com>

web/html/packages.php

@@ -70,8 +70,10 @@ if (isset($_GET['ID'])) {
 		package_details($_GET['ID'], $_COOKIE["AURSID"]);
 	}
 } else {
-	$_GET['SB'] = 'v';
-	$_GET['SO'] = 'd';
+	if (!isset($_GET['SB'])) {
+		$_GET['SB'] = 'v';
+		$_GET['SO'] = 'd';
+	}
 	pkg_search_page($_COOKIE["AURSID"]);
 }