fix building with DirectFB-1.2.3

http://bugs.gentoo.org/235041

patch by Philippe Weibel

--- dfb++/idirectfbvideoprovider.cpp
+++ dfb++/idirectfbvideoprovider.cpp
@@ -165,7 +165,7 @@
      return level;
 }
 
-void IDirectFBVideoProvider::SetStreamAttributes (DFBStreamDescription attr)
+void IDirectFBVideoProvider::SetStreamAttributes (DFBStreamAttributes attr)
 {
      DFBCHECK( iface->SetStreamAttributes (iface, attr) );
 }
--- include/idirectfbvideoprovider.h
+++ include/idirectfbvideoprovider.h
@@ -68,7 +68,7 @@
      float                        GetVolume             ();
 
 
-     void                         SetStreamAttributes   (DFBStreamDescription        attr);
+     void                         SetStreamAttributes   (DFBStreamAttributes        attr);
 
      void                         SetAudioOutputs       (DFBVideoProviderAudioUnits *audioUnits);
      DFBVideoProviderAudioUnits   GetAudioOutputs       ();