The source project of this merge request has been removed.
Improve static type-safety of signal handlers
This patch fixes the invalid return type of the label_draw() function.
The global CpuFreqPlugin variable now uses Ptr0<CpuFreqPlugin> instead of CpuFreqPlugin*. This global variable should be removed in the future, in order for the plugin instance to be deallocated automatically. If xfce4-panel is started with the G_MESSAGES_DEBUG environment variable set to "all": CpuFreqPlugin's destructor prints a console info message. A similar message is printed in the case of CpuFreqPluginConfigure's destructor.