LuaState can push strings with embedded NULs.

This also marginally improves performance, since a strlen() isn't called (inside lua_pushstring()), the string length is stored in the AString object directly.

src/Bindings/LuaState.cpp

@@ -297,7 +297,7 @@ void cLuaState::Push(const AString & a_String)
 {
 	ASSERT(IsValid());
 
-	tolua_pushcppstring(m_LuaState, a_String);
+	lua_pushlstring(m_LuaState, a_String.data(), a_String.size());
 	m_NumCurrentFunctionArgs += 1;
 }