Fix typo in Widget method, reduce precise mouse speed for Knobs, remove

Module() constructor

include/engine.hpp

@@ -38,7 +38,7 @@ struct Module {
 	float cpuTime = 0.0;
 
 	/** Deprecated, use constructor below this one */
-	Module() {}
+	// Module() {}
 	/** Constructs Module with a fixed number of params, inputs, and outputs */
 	Module(int numParams, int numInputs, int numOutputs) {
 		params.resize(numParams);

include/widgets.hpp

@@ -58,6 +58,7 @@ struct Widget {
 
 	Vec getAbsolutePos();
 	Rect getChildrenBoundingBox();
+
 	template <class T>
 	T *getAncestorOfType() {
 		if (!parent) return NULL;
@@ -66,6 +67,17 @@ struct Widget {
 		return parent->getAncestorOfType<T>();
 	}
 
+	template <class T>
+	T *getFirstDescendantOfType() {
+		for (Widget *child : children) {
+			T *c = dynamic_cast<T*>(child);
+			if (c) return c;
+			c = child->getFirstDescendantOfType<T>();
+			if (c) return c;
+		}
+		return NULL;
+	}
+
 	/** Adds widget to list of children.
 	Gives ownership of widget to this widget instance.
 	*/

src/app/Knob.cpp

@@ -17,7 +17,7 @@ void Knob::onDragStart() {
 void Knob::onDragMove(Vec mouseRel) {
 	// Drag slower if Mod
 	if (guiIsModPressed())
-		mouseRel = mouseRel.mult(0.1);
+		mouseRel = mouseRel.mult(1/16.0);
 	setValue(value - KNOB_SENSITIVITY * (maxValue - minValue) * mouseRel.y);
 }