Fix reference counting of sources of cloned surfaces

src/Surfaces/GridWarpSurface.cpp

@@ -247,7 +247,9 @@ BaseSurface * GridWarpSurface::clone(){
 	GridWarpSurface * s = new GridWarpSurface();
 	s->setVertices(getVertices());
 	s->setTexCoords(getTexCoords());
-	s->setSource(getSource());
+    BaseSource * src = getSource();
+    src->referenceCount++;
+	s->setSource(src);
 	return s;
 }
 

src/Surfaces/QuadSurface.cpp

@@ -293,7 +293,9 @@ BaseSurface * QuadSurface::clone(){
 	QuadSurface * s = new QuadSurface();
 	s->setVertices(getVertices());
 	s->setTexCoords(getTexCoords());
-	s->setSource(getSource());
+    BaseSource * src = getSource();
+    src->referenceCount++;
+	s->setSource(src);
 	return s;
 }
 

src/Surfaces/QuadSurface.h

@@ -14,7 +14,6 @@ class QuadSurface : public BaseSurface {
 		~QuadSurface();
 
 		void setup();
-
 		void setup(ofVec2f p1, ofVec2f p2, ofVec2f p3, ofVec2f p4, ofVec2f t1,
 				   ofVec2f t2, ofVec2f t3, ofVec2f t4, BaseSource * newSource);
 

src/Surfaces/TriangleSurface.cpp

@@ -189,7 +189,9 @@ BaseSurface * TriangleSurface::clone(){
 	TriangleSurface * s = new TriangleSurface();
 	s->setVertices(getVertices());
 	s->setTexCoords(getTexCoords());
-	s->setSource(getSource());
+    BaseSource * src = getSource();
+    src->referenceCount++;
+	s->setSource(src);
 	return s;
 }