Small fix that prevents session data from getting corrupted when the Facebook PHP SDK is used within Kohana

fbsdk-php_kohana-session-fix.patch

Index: src/application/vendor/facebook-sdk/src/facebook.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/application/vendor/facebook-sdk/src/facebook.php	(revision )
+++ src/application/vendor/facebook-sdk/src/facebook.php	(revision )
@@ -106,7 +106,7 @@
     }
 
     $session_var_name = $this->constructSessionVariableName($key);
-    $_SESSION[$session_var_name] = $value;
+	Session::instance()->set($session_var_name, $value);
   }
 
   protected function getPersistentData($key, $default = false) {
@@ -116,8 +116,7 @@
     }
 
     $session_var_name = $this->constructSessionVariableName($key);
-    return isset($_SESSION[$session_var_name]) ?
-      $_SESSION[$session_var_name] : $default;
+    return Session::instance()->get($session_var_name, $default);
   }
 
   protected function clearPersistentData($key) {
@@ -127,7 +126,7 @@
     }
 
     $session_var_name = $this->constructSessionVariableName($key);
-    unset($_SESSION[$session_var_name]);
+	Session::instance()->delete($session_var_name);
   }
 
   protected function clearAllPersistentData() {