Explicit cast

(cherry picked from commit 80bbffa39fbf4386ed69e1305b3426cb677df79e)

Source commit: b5e09550453a3e28a0192c1bf7927ca0dc01e24e

source/core/FileBuffer.cpp

@@ -236,7 +236,7 @@ void __fastcall TFileBuffer::WriteToStream(TStream * Stream, const DWORD Len)
 //---------------------------------------------------------------------------
 void __fastcall TFileBuffer::WriteToOut(TTransferOutEvent OnTransferOut, TObject * Sender, const DWORD Len)
 {
-  OnTransferOut(Sender, Data + Position, Len);
+  OnTransferOut(Sender, reinterpret_cast<const unsigned char *>(Data) + Position, Len);
   FMemory->Seek(Len, soCurrent);
 }
 //---------------------------------------------------------------------------