Reworked IndexBuffer, Vertex[Buffer|Declaration|Structs]

Former-commit-id: e3f637f2680afda57a444f73b8f7ad681bb1b8a5

src/Nazara/Utility/Image.cpp

@@ -50,7 +50,7 @@ m_sharedImage(&emptyImage)
 }
 
 NzImage::NzImage(const NzImage& image) :
-NzResource(image),
+NzResource(),
 m_sharedImage(image.m_sharedImage)
 {
 	if (m_sharedImage != &emptyImage)
@@ -63,6 +63,11 @@ m_sharedImage(image.m_sharedImage)
 	image.m_sharedImage = &emptyImage;
 }
 
+NzImage::NzImage(SharedImage* sharedImage) :
+m_sharedImage(sharedImage)
+{
+}
+
 NzImage::~NzImage()
 {
 	Destroy();