include: Fix some winsock definitions.
diff --git a/include/ws2spi.h b/include/ws2spi.h
index b30c45c..5df7d24 100644
--- a/include/ws2spi.h
+++ b/include/ws2spi.h
@@ -42,6 +42,7 @@
 INT      WINAPI WSCGetProviderPath(LPGUID,LPWSTR,LPINT,LPINT);
 INT      WINAPI WSCInstallNameSpace(LPWSTR,LPWSTR,DWORD,DWORD,LPGUID);
 INT      WINAPI WSCUnInstallNameSpace(LPGUID);
+INT      WINAPI WSCUpdateProvider(LPGUID, const WCHAR *, const LPWSAPROTOCOL_INFOW, DWORD, LPINT);
 INT      WINAPI WSCWriteProviderOrder(LPDWORD,DWORD);
 
 #ifdef __cplusplus