[libpeas/meson.msvc: 15/19] test/libpeas-gtk/plugin-manager: Use en-US locale on Windows

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

commit aad052d6808fbd79d139f94fc88dc3e6f0947910
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Nov 20 15:36:32 2019 +0800

    test/libpeas-gtk/plugin-manager: Use en-US locale on Windows
    
    This will allow the tests here to pass on non-English versions of
    Windows when translations of the GTK+ stack is present.

 tests/libpeas-gtk/plugin-manager.c | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/tests/libpeas-gtk/plugin-manager.c b/tests/libpeas-gtk/plugin-manager.c
index 614cceab..f2e9147b 100644
--- a/tests/libpeas-gtk/plugin-manager.c
+++ b/tests/libpeas-gtk/plugin-manager.c
@@ -27,6 +27,11 @@
 #include <libpeas/peas-i18n-priv.h>
 #include <libpeas-gtk/peas-gtk.h>
 
+#ifdef G_OS_WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif
+
 #include "testing/testing.h"
 
 typedef struct _TestFixture TestFixture;
@@ -381,6 +386,10 @@ main (int    argc,
 {
   testing_init (&argc, &argv);
 
+#ifdef G_OS_WIN32
+  SetThreadLocale (MAKELCID (MAKELANGID (LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT));
+#endif
+
 #define TEST(path, ftest) \
   g_test_add ("/gtk/plugin-manager/" path, TestFixture, \
               (gpointer) test_gtk_plugin_manager_##ftest, \