fix build

Caused by 185e1be6,
fix is more or less d0d07cd2.

Change-Id: Ia7d228139126b3e60370b85c106bc970f4e68cce
Reviewed-on: https://gerrit.libreoffice.org/2154Reviewed-by: Tor Lillqvist <tml@iki.fi>
Tested-by: Tor Lillqvist <tml@iki.fi>

sd/source/ui/remotecontrol/BluetoothServer.cxx

@@ -36,7 +36,15 @@
   #undef WB_LEFT
   #undef WB_RIGHT
   #include <winsock2.h>
+  // HACK: ws2bth.h defines a struct with a field named MSC, which is
+  // a #define set by gbuild. Plain #undef MSC here fails with MSVC
+  // used together with ccache (bug, presumably), so #define it to some
+  // other usable value.
+  #undef MSC
+  #define MSC mscfield
   #include <ws2bth.h>
+  #undef MSC
+  #define MSC
 #endif
 
 #ifdef MACOSX