Update gtkpopcountprivate.h: undefined macro outside msvc

diff --git a/gtk/gtkpopcountprivate.h b/gtk/gtkpopcountprivate.h
index e0eeb3fdf873f46f39abb3a035990ec22eb7cfe7..d2dff5199050b98d8f8a8d5185dc3738462bd47a 100644 (file)
--- a/gtk/gtkpopcountprivate.h
+++ b/gtk/gtkpopcountprivate.h
@@ -20,7 +20,7 @@
 
 #pragma once
 
-#if (_MSC_VER && !_M_ARM && !_M_ARM64) && (__AVX__ || __SSE4_2__ || __POPCNT__)
+#if (defined(_MSC_VER) && !_M_ARM && !_M_ARM64) && (__AVX__ || __SSE4_2__ || __POPCNT__)
 #include <intrin.h>
 
 static inline guint