Apidox for the plugin export macro

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=832056

dataengine.h

@@ -429,6 +429,9 @@ class PLASMA_EXPORT DataEngine : public QObject
 
 } // Plasma namespace
 
+/**
+ * Register a data engine when it is contained in a loadable module
+ */
 #define K_EXPORT_PLASMA_DATAENGINE(libname, classname) \
 K_PLUGIN_FACTORY(factory, registerPlugin<classname>();) \
 K_EXPORT_PLUGIN(factory("plasma_engine_" #libname))