Declaration of Piwik_Log_APICall::log() should be compatible with that of Piwik_Log::log() 
in '/kunden/dirk-hoffmann.net/sites/dirk-hoffmann.net/piwik.dirk-hoffmann.net/core/Log/APICall.php' at the line 52

#0  Piwik_ErrorHandler(2048, Declaration of Piwik_Log_APICall::log() should be compatible with that of Piwik_Log::log(), /kunden/dirk-hoffmann.net/sites/dirk-hoffmann.net/piwik.dirk-hoffmann.net/core/Log/APICall.php, 52, Array ()) called at [(null):0]
#1  Piwik::createLogObject() called at [/kunden/dirk-hoffmann.net/sites/dirk-hoffmann.net/piwik.dirk-hoffmann.net/core/Piwik.php:1201]
#2  Piwik::createLogObject() called at [/kunden/dirk-hoffmann.net/sites/dirk-hoffmann.net/piwik.dirk-hoffmann.net/core/FrontController.php:235]
#3  Piwik_FrontController->init() called at [/kunden/dirk-hoffmann.net/sites/dirk-hoffmann.net/piwik.dirk-hoffmann.net/index.php:50]