Index: /trunk/src/org/openstreetmap/josm/gui/mappaint/MapImage.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/mappaint/MapImage.java	(revision 5073)
+++ /trunk/src/org/openstreetmap/josm/gui/mappaint/MapImage.java	(revision 5074)
@@ -20,5 +20,5 @@
 public class MapImage {
     /**
-     * ImageIcon can chage while the image is loading.
+     * ImageIcon can change while the image is loading.
      */
     private BufferedImage img;
@@ -44,4 +44,6 @@
         if (disabledImg != null)
             return disabledImg;
+        if (img == null)
+            getImage(); // fix #7498 ?
         return disabledImg = GrayFilter.createDisabledImage(img);
     }