Catches error with update on editors without parameterEditors

Fixes a bug with my previous change that would crash the program if you
tried to change the parameters of a processor without a parameterEditor.

Source/Processors/Editors/GenericEditor.cpp

@@ -770,6 +770,12 @@ void TriangleButton::paintButton(Graphics& g, bool isMouseOver, bool isButtonDow
 }
 
 void GenericEditor::updateParameterButtons(int parameterIndex=-1){
+    if (parameterEditors.size()==0)
+    {
+        //Checks if there is a parameter editor, and stops a bug if there isn't.
+        std::cout << "No parameterEditors" << std::endl;
+    }
+    else{
     if (parameterIndex==-1){
         for (int i = 0; i < parameterEditors.size(); ++i)
         {
@@ -780,4 +786,5 @@ void GenericEditor::updateParameterButtons(int parameterIndex=-1){
         parameterEditors[parameterIndex]->channelSelectionUI();
     }
     std::cout << "updateParameterButtons" << std::endl;
+    }
 }

Source/Processors/Editors/ParameterEditor.cpp

@@ -510,7 +510,6 @@ void ParameterEditor::channelSelectionUI()
 {
 
     int numChannels=channelSelector->getNumChannels();
-    Array<var> possibleValues=parameter->getPossibleValues();
     if (parameter->isBoolean())
     {
 
@@ -522,6 +521,7 @@ void ParameterEditor::channelSelectionUI()
     else if (parameter->isDiscrete())
     {
         std::cout << "Calculating colors for discrete buttons" << std::endl;
+        Array<var> possibleValues=parameter->getPossibleValues();
 
         for (int i = 0; i < buttonArray.size(); i++)
         {

Source/Processors/SourceNode.cpp

@@ -199,7 +199,6 @@ void SourceNode::enabledState(bool t)
 
 void SourceNode::setParameter(int parameterIndex, float newValue)
 {
-    editor->updateParameterButtons(parameterIndex);
     editor->updateParameterButtons(parameterIndex);
     //std::cout << "Got parameter change notification";
 }