[libpeas/msvc: 5/8] libpeas: Mark one more private API for export

[Chun-wei Fan <fanchunwei src gnome org>]

commit 95b9a708e62b8818cb0482fb54dba20a3ebc00ef
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Oct 17 00:39:45 2018 +0800

    libpeas: Mark one more private API for export
    
    The test programs will require it, so we mark that for export as well

 libpeas/peas-engine-priv.h | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/libpeas/peas-engine-priv.h b/libpeas/peas-engine-priv.h
index c8fa9fd..a8727e1 100644
--- a/libpeas/peas-engine-priv.h
+++ b/libpeas/peas-engine-priv.h
@@ -19,11 +19,14 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
  */
 
+#include "peas-macros.h"
+
 #ifndef __PEAS_ENGINE_PRIV_H__
 #define __PEAS_ENGINE_PRIV_H__
 
 G_BEGIN_DECLS
 
+_PEAS_EXTERN
 void peas_engine_shutdown (void);
 
 G_END_DECLS