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data-device.c: Handle failure to allocate offer in weston_drag_set_focus
If we fail to allocate and send the offer, don't send the drag enter and don't set the drag focus so we don't send motion events or leave.
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@ -238,6 +238,8 @@ weston_drag_set_focus(struct weston_drag *drag, struct weston_surface *surface,
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if (drag->data_source)
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offer = weston_data_source_send_offer(drag->data_source,
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resource);
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if (offer == NULL)
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return;
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wl_data_device_send_enter(resource, serial, surface->resource,
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sx, sy, offer);
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