Fix errors and warnings

Former-commit-id: a3ba309633f198f82c1d0277d750d867cad4ba44

src/Nazara/Renderer/Renderer.cpp

@@ -1546,7 +1546,7 @@ namespace Nz
 						glBindBuffer(OpenGL::BufferTarget[BufferType_Vertex], vertexBufferImpl->GetOpenGLID());
 
 						unsigned int bufferOffset = vertexBuffer->GetStartOffset();
-						const VertexDeclaration* vertexDeclaration = vertexBuffer->GetVertexDeclaration();
+						vertexDeclaration = vertexBuffer->GetVertexDeclaration();
 						unsigned int stride = vertexDeclaration->GetStride();
 
 						// On définit les bornes (une fois de plus selon l'itération)
@@ -1934,4 +1934,4 @@ namespace Nz
 	}
 
 	unsigned int Renderer::s_moduleReferenceCounter = 0;
-}
+}