Fixed a typo in the AUv3Synth sample code

examples/AUv3Synth/Source/AUv3SynthProcessor.cpp

@@ -49,7 +49,7 @@ public:
     //==============================================================================
     bool isBusesLayoutSupported (const BusesLayout& layouts) const override
     {
-        return (layouts.getMainInputChannels() == 2);
+        return (layouts.getMainOutputChannels() == 2);
     }
 
     void prepareToPlay (double sampleRate, int estimatedMaxSizeOfBuffer) override