Sprite: Add missing references to arguments

Author: adazem009

src/scratch/sprite.cpp

@@ -124,7 +124,7 @@ void Sprite::setRotationStyle(RotationStyle newRotationStyle)
 }
 
 /*! \copydoc setRotationStyle() */
-void Sprite::setRotationStyle(std::string newRotationStyle)
+void Sprite::setRotationStyle(const std::string &newRotationStyle)
 {
     if (newRotationStyle == "all around")
         setRotationStyle(RotationStyle::AllAround);

src/scratch/sprite.h

@@ -43,7 +43,7 @@ class LIBSCRATCHCPP_EXPORT Sprite : public Target
         RotationStyle rotationStyle() const;
         std::string rotationStyleStr() const;
         void setRotationStyle(RotationStyle newRotationStyle);
-        void setRotationStyle(std::string newRotationStyle);
+        void setRotationStyle(const std::string &newRotationStyle);
         void setRotationStyle(const char *newRotationStyle);
 
     protected: