Get rid of string copy in fileWrite

Author: botder

Shared/mods/deathmatch/logic/luadefs/CLuaFileDefs.cpp

@@ -732,7 +732,7 @@ int CLuaFileDefs::fileWrite(lua_State* luaVM)
     CScriptArgReader argStream(luaVM);
     argStream.ReadUserData(pFile);
 
-    // Ensure we have atleast one string
+    // Ensure we have at least one string
     if (!argStream.NextIsString())
         argStream.SetTypeError("string");
 
@@ -745,12 +745,14 @@ int CLuaFileDefs::fileWrite(lua_State* luaVM)
         while (argStream.NextIsString())
         {
             // Grab argument and length
-            SString strData;
-            argStream.ReadString(strData);
-            unsigned long ulDataLen = strData.length();
+            SCharStringRef strData;
+            argStream.ReadCharStringRef(strData);
+
+            if (argStream.HasErrors() || !strData.pData)
+                continue;
 
             // Write the data
-            long lArgBytesWritten = pFile->Write(ulDataLen, strData);
+            long lArgBytesWritten = pFile->Write(strData.uiSize, strData.pData);
 
             // Did the file mysteriously disappear?
             if (lArgBytesWritten == -1)