Cleaned interface

And fixed some VS warnings


Former-commit-id: 8c89fa1d4dc92a362053e4cdeabe20537fcec2a6

src/Nazara/Core/MemoryStream.cpp

@@ -35,7 +35,7 @@ nzUInt64 NzMemoryStream::GetSize() const
 
 std::size_t NzMemoryStream::Read(void* buffer, std::size_t size)
 {
-	unsigned int readSize = std::min(static_cast<nzUInt64>(size), m_size-m_pos);
+	unsigned int readSize = std::min(static_cast<unsigned int>(size), static_cast<unsigned int>(m_size-m_pos));
 	std::memcpy(buffer, &m_ptr[m_pos], readSize);
 	m_pos += readSize;