Use XkbKeycodeToKeysym() in stead of XKeycodeToKeysym().

XKeycodeToKeysym() is deprecated.

viewer.c

@@ -7,6 +7,7 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <X11/Xlib.h>
+#include <X11/XKBlib.h>
 #include <gdk/gdkx.h>
 #include <unistd.h>
 
@@ -258,8 +259,8 @@ e_cb_key_change(GtkWidget * widget __UNUSED__, gpointer data __UNUSED__)
 #else
       gdk_keyboard_ungrab(gdk_time_get());
 #endif
-      key = XKeysymToString(XKeycodeToKeysym(GDK_DISPLAY(),
-					     ev.xkey.keycode, 0));
+      key = XKeysymToString(XkbKeycodeToKeysym(GDK_DISPLAY(),
+					     ev.xkey.keycode, 0, 0));
       gtk_entry_set_text(GTK_ENTRY(act_key), key);
       gtk_clist_set_text(GTK_CLIST(clist), last_row, 1, key);
    }