Match return types with underlying SFML interface

include/CSFML/Graphics/VertexBuffer.h

@@ -97,7 +97,7 @@ CSFML_GRAPHICS_API void sfVertexBuffer_destroy(sfVertexBuffer* vertexBuffer);
 /// \return Number of vertices in the vertex buffer
 ///
 ////////////////////////////////////////////////////////////
-CSFML_GRAPHICS_API unsigned int sfVertexBuffer_getVertexCount(const sfVertexBuffer* vertexBuffer);
+CSFML_GRAPHICS_API size_t sfVertexBuffer_getVertexCount(const sfVertexBuffer* vertexBuffer);
 
 ////////////////////////////////////////////////////////////
 /// \brief Update a part of the buffer from an array of vertices

src/CSFML/Graphics/VertexBuffer.cpp

@@ -66,10 +66,10 @@ void sfVertexBuffer_destroy(sfVertexBuffer* vertexBuffer)
 
 
 ////////////////////////////////////////////////////////////
-unsigned int sfVertexBuffer_getVertexCount(const sfVertexBuffer* vertexBuffer)
+size_t sfVertexBuffer_getVertexCount(const sfVertexBuffer* vertexBuffer)
 {
     assert(vertexBuffer);
-    return static_cast<unsigned int>(vertexBuffer->This.getVertexCount());
+    return vertexBuffer->This.getVertexCount();
 }