Demo plugin fix.

extras/audio plugin demo/Source/PluginProcessor.cpp

@@ -372,6 +372,11 @@ bool JuceDemoPluginAudioProcessor::producesMidi() const
    #endif
 }
 
+bool JuceDemoPluginAudioProcessor::silenceInProducesSilenceOut() const
+{
+    return false;
+}
+
 //==============================================================================
 // This creates new instances of the plugin..
 AudioProcessor* JUCE_CALLTYPE createPluginFilter()

extras/audio plugin demo/Source/PluginProcessor.h

@@ -50,6 +50,7 @@ public:
 
     bool acceptsMidi() const;
     bool producesMidi() const;
+    bool silenceInProducesSilenceOut() const;
 
     //==============================================================================
     int getNumPrograms()                                                { return 0; }

modules/juce_gui_basics/drawables/juce_DrawableRectangle.cpp

@@ -72,8 +72,8 @@ void DrawableRectangle::rebuildPath()
     }
     else
     {
-        setPositioner (0);
-        recalculateCoordinates (0);
+        setPositioner (nullptr);
+        recalculateCoordinates (nullptr);
     }
 }