Added to the AudioProcessorValueTreeState documentation

modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h

@@ -122,6 +122,8 @@ public:
     AudioProcessor& processor;
 
     /** The state of the whole processor.
+
+        This must be initialised after all calls to createAndAddParameter().
         You can replace this with your own ValueTree object, and can add properties and
         children to the tree. This class will automatically add children for each of the
         parameter objects that are created by createParameter().