[ghex] appwindow: fix ifdef for nag screen

[Logan Rathbone <larathbone src gnome org>]

commit 9d483a5c1550317b0e38e5b1e453685f178b148b
Author: Logan Rathbone <poprocks gmail com>
Date:   Tue Dec 21 22:17:42 2021 -0500

    appwindow: fix ifdef for nag screen

 src/ghex-application-window.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/ghex-application-window.c b/src/ghex-application-window.c
index 642670c..6774576 100644
--- a/src/ghex-application-window.c
+++ b/src/ghex-application-window.c
@@ -35,7 +35,7 @@
 #define ACTIVE_GH      \
        (ghex_application_window_get_hex (self))
 
-#ifndef EXPERIMENTAL_MMAP
+#ifndef BACKEND_MMAP
 static GFile *tmp_global_gfile_for_nag_screen;
 #endif
 
@@ -1978,7 +1978,7 @@ ghex_application_window_add_hex (GHexApplicationWindow *self,
                        G_CALLBACK(file_saved_cb), self);
 }
 
-#ifndef EXPERIMENTAL_MMAP
+#ifndef BACKEND_MMAP
 /* Helper */
 static void
 nag_screen_response_cb (GtkDialog *nag_screen,
@@ -2072,13 +2072,13 @@ ghex_application_window_open_file (GHexApplicationWindow *self, GFile *file)
 {
        HexDocument *doc;
        GtkHex *gh = NULL;
-#ifndef EXPERIMENTAL_MMAP
+#ifndef BACKEND_MMAP
        static gboolean nag_screen_shown = FALSE;
 #endif
 
        g_return_if_fail (GHEX_IS_APPLICATION_WINDOW(self));
 
-#ifndef EXPERIMENTAL_MMAP
+#ifndef BACKEND_MMAP
        if (! nag_screen_shown)
                /* FIXME: Temporary nag-screen until we get the underlying issues
                 * sorted. */