RTAS midi channel mask fix.

modules/juce_audio_plugin_client/RTAS/juce_RTAS_Wrapper.cpp

@@ -487,7 +487,7 @@ protected:
                                                                    nodeName,
                                                                    midiBuffer);
 
-                midiBufferNode->Initialize (1, true);
+                midiBufferNode->Initialize (0xffff, true);
             }
            #endif
         }