DSPModulePluginDemo: Fix crash in Live due to selecting unsupported bus layout

examples/Plugins/DSPModulePluginDemo.h

@@ -219,6 +219,13 @@ public:
 
     void changeProgramName (int, const String&) override {}
 
+    //==============================================================================
+    bool isBusesLayoutSupported (const BusesLayout& layout) const override
+    {
+        return layout == BusesLayout { { AudioChannelSet::stereo() },
+                                       { AudioChannelSet::stereo() } };
+    }
+
     //==============================================================================
     void getStateInformation (MemoryBlock& destData) override
     {