Index: /trunk/src/org/openstreetmap/josm/gui/layer/geoimage/GeoImageLayer.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/layer/geoimage/GeoImageLayer.java	(revision 4976)
+++ /trunk/src/org/openstreetmap/josm/gui/layer/geoimage/GeoImageLayer.java	(revision 4977)
@@ -726,5 +726,5 @@
                 if (ev.getButton() != MouseEvent.BUTTON1)
                     return;
-                if (!isVisible())
+                if (data == null || !isVisible())
                     return;