add required header for windows compile of FPU code

diff --git a/libs/pbd/fpu.cc b/libs/pbd/fpu.cc
index d527cb816affa0d80582de019d2537e699f34208..a6663d22b4fe211f535e5198b9c1f44c261a35e5 100644 (file)
--- a/libs/pbd/fpu.cc
+++ b/libs/pbd/fpu.cc
@@ -23,6 +23,7 @@
 #include <cstring> // for memset
 #include <cstdlib>
 #include <stdint.h>
+#include <intrin.h>
 #include <assert.h>
 
 #include "pbd/fpu.h"