Rename the StretchType enum in Actor

The lowercase enum is confusing because it looks like a variable. This prefixes it with a class name so it's easier to understand its purpose.

src/Actor.cpp

@@ -1078,13 +1078,14 @@ void Actor::ScaleTo( const RectF &rect, StretchType st )
 	float fNewZoomY = std::abs(rect_height / m_size.y);
 
 	float fNewZoom = 0.f;
-	switch( st )
+
+	switch (st)
 	{
-	case cover:
-		fNewZoom = fNewZoomX>fNewZoomY ? fNewZoomX : fNewZoomY;	// use larger zoom
+	case kCover:
+		fNewZoom = fNewZoomX > fNewZoomY ? fNewZoomX : fNewZoomY; // use larger zoom
 		break;
-	case fit_inside:
-		fNewZoom = fNewZoomX>fNewZoomY ? fNewZoomY : fNewZoomX; // use smaller zoom
+	case kFitInside:
+		fNewZoom = fNewZoomX > fNewZoomY ? fNewZoomY : fNewZoomX; // use smaller zoom
 		break;
 	}
 

src/Actor.h

@@ -501,12 +501,12 @@ public:
 	/** @brief How do we handle stretching the Actor? */
 	enum StretchType
 	{
-		fit_inside, /**< Have the Actor fit inside its parent, using the smaller zoom. */
-		cover /**< Have the Actor cover its parent, using the larger zoom. */
+		kFitInside, /**< Have the Actor fit inside its parent, using the smaller zoom. */
+		kCover /**< Have the Actor cover its parent, using the larger zoom. */
 	};
 
-	void ScaleToCover( const RectF &rect )		{ ScaleTo( rect, cover ); }
-	void ScaleToFitInside( const RectF &rect )	{ ScaleTo( rect, fit_inside); };
+	void ScaleToCover( const RectF &rect )		{ ScaleTo( rect, kCover ); }
+	void ScaleToFitInside( const RectF &rect )	{ ScaleTo( rect, kFitInside); };
 	void ScaleTo( const RectF &rect, StretchType st );
 
 	void StretchTo( const RectF &rect );