Bring include of defaultprovider back

Author: dragotin

src/addressprovider.cpp

@@ -15,9 +15,10 @@
  *                                                                         *
  ***************************************************************************/
 #include <kcontacts_version.h>
-#include "addressprovider.h"
 #include <QDebug>
 
+#include "addressprovider.h"
+#include "defaultprovider.h"
 // FIXME this needs to change once there are more address book providers, ie.
 // on Mac.
 #ifdef HAVE_AKONADI