fix correct export macro guard in libpbd for mingw64

diff --git a/libs/pbd/pbd/libpbd_visibility.h b/libs/pbd/pbd/libpbd_visibility.h
index 14b12556499d05b57606a16e9a8d55772b324ec8..c2cd924a8104bbcf3f644ebc326e24d742aa340b 100644 (file)
--- a/libs/pbd/pbd/libpbd_visibility.h
+++ b/libs/pbd/pbd/libpbd_visibility.h
@@ -20,7 +20,7 @@
 #ifndef __libpbd_libpbd_visibility_h__
 #define __libpbd_libpbd_visibility_h__
 
-#if defined(COMPILER_MSVC) || defined(COMPILER_MINGW64)
+#if defined(COMPILER_MSVC) || defined(__MINGW64__)
   #define LIBPBD_DLL_IMPORT __declspec(dllimport)
   #define LIBPBD_DLL_EXPORT __declspec(dllexport)
   #define LIBPBD_DLL_LOCAL