Convert to pragma once

luprex/cpp/core/streambuffer.hpp

@@ -199,8 +199,7 @@
 //////////////////////////////////////////////////////////////
 
 
-#ifndef STREAMBUFFER_HPP
-#define STREAMBUFFER_HPP
+#pragma once
 
 #include "wrap-string.hpp"
 #include "wrap-sstream.hpp"
@@ -279,5 +278,3 @@ public:
 
 // Use a streambuffer as a lua_writer.
 int lua_writer_into_streambuffer(lua_State *L, const void* bytes, size_t sz, void* sb);
-
-#endif // STREAMBUFFER_HPP