Ticket #3687: npe-in-remove.patch

src/org/openstreetmap/josm/data/osm/QuadBuckets.java

@@ -886 +886 @@
     public boolean remove(T n)
     {
         QBLevel bucket = root.find_exact(n);
-        if (!bucket.isLeaf())
-            abort("found branch where leaf expected");
+        if (bucket == null)
+            return false;
         boolean ret = bucket.remove_content(n);
         return ret;
     }