W32: Make _g_win32_get_system_data_dirs() inline available in C++
This way g_get_system_data_dirs() works the same way in C and C++.
https://bugzilla.gnome.org/show_bug.cgi?id=777501
Closes #1240
diff --git a/glib/gutils.h b/glib/gutils.h
index 52b6297..b301e93 100644
--- a/glib/gutils.h
+++ b/glib/gutils.h
@@ -83,7 +83,7 @@
const gchar * const * g_win32_get_system_data_dirs_for_module (void (*address_of_function)(void));
#endif
-#if defined (G_OS_WIN32) && defined (G_CAN_INLINE) && !defined (__cplusplus)
+#if defined (G_OS_WIN32) && defined (G_CAN_INLINE)
/* This function is not part of the public GLib API either. Just call
* g_get_system_data_dirs() in your code, never mind that that is
* actually a macro and you will in fact call this inline function.
