Fix  heard hic-up I produced.


git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@1321 4407c894-4637-0410-b4f5-ada5f102cad1

mingw-w64-headers/include/winsock.h

diff --git a/mingw-w64-headers/include/winsock.h b/mingw-w64-headers/include/winsock.h
index 9f9a8fa..f6635de 100644
--- a/mingw-w64-headers/include/winsock.h
+++ b/mingw-w64-headers/include/winsock.h
@@ -380,6 +380,9 @@
 #endif
 #endif
 #else
+#ifndef _INC_WINSOCK_H
+#define _INC_WINSOCK_H
 #include <winsock2.h>
 #include <mswsock.h>
 #endif
+#endif