example/overlay: Specify minimum gdk version
Avoids deprecation warnings (such as for gtk_widget_set_double_buffered() which became deprecated from 3.14)
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@ -23,6 +23,8 @@
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#include "config.h"
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#include "config.h"
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#endif
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#endif
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#define GDK_VERSION_MIN_REQUIRED (GDK_VERSION_3_0)
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#include <glib.h>
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#include <glib.h>
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#include <gdk/gdkx.h>
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#include <gdk/gdkx.h>
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#include <gtk/gtk.h>
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#include <gtk/gtk.h>
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