Fix const correctness issue

Author: ChrisThrasher

include/CSFML/Graphics/VertexArray.h

@@ -150,7 +150,7 @@ CSFML_GRAPHICS_API void sfVertexArray_setPrimitiveType(sfVertexArray* vertexArra
 /// \return Primitive type
 ///
 ////////////////////////////////////////////////////////////
-CSFML_GRAPHICS_API sfPrimitiveType sfVertexArray_getPrimitiveType(sfVertexArray* vertexArray);
+CSFML_GRAPHICS_API sfPrimitiveType sfVertexArray_getPrimitiveType(const sfVertexArray* vertexArray);
 
 ////////////////////////////////////////////////////////////
 /// \brief Compute the bounding rectangle of a vertex array
@@ -163,4 +163,4 @@ CSFML_GRAPHICS_API sfPrimitiveType sfVertexArray_getPrimitiveType(sfVertexArray*
 /// \return Bounding rectangle of the vertex array
 ///
 ////////////////////////////////////////////////////////////
-CSFML_GRAPHICS_API sfFloatRect sfVertexArray_getBounds(sfVertexArray* vertexArray);
+CSFML_GRAPHICS_API sfFloatRect sfVertexArray_getBounds(const sfVertexArray* vertexArray);

src/CSFML/Graphics/VertexArray.cpp

@@ -104,15 +104,15 @@ void sfVertexArray_setPrimitiveType(sfVertexArray* vertexArray, sfPrimitiveType
 
 
 ////////////////////////////////////////////////////////////
-sfPrimitiveType sfVertexArray_getPrimitiveType(sfVertexArray* vertexArray)
+sfPrimitiveType sfVertexArray_getPrimitiveType(const sfVertexArray* vertexArray)
 {
     assert(vertexArray);
     return static_cast<sfPrimitiveType>(vertexArray->getPrimitiveType());
 }
 
 
 ////////////////////////////////////////////////////////////
-sfFloatRect sfVertexArray_getBounds(sfVertexArray* vertexArray)
+sfFloatRect sfVertexArray_getBounds(const sfVertexArray* vertexArray)
 {
     assert(vertexArray);
     return convertRect(vertexArray->getBounds());