Index: /applications/editors/josm/plugins/splinex/src/org/openstreetmap/josm/plugins/Splinex/SplineHitTest.java
===================================================================
--- /applications/editors/josm/plugins/splinex/src/org/openstreetmap/josm/plugins/Splinex/SplineHitTest.java	(revision 32917)
+++ /applications/editors/josm/plugins/splinex/src/org/openstreetmap/josm/plugins/Splinex/SplineHitTest.java	(revision 32918)
@@ -1,4 +1,6 @@
 // License: GPL. For details, see LICENSE file.
 package org.openstreetmap.josm.plugins.Splinex;
+
+import org.openstreetmap.josm.Main;
 
 public class SplineHitTest {
@@ -24,4 +26,7 @@
 
     public boolean checkCurve(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) {
+        if (Main.isDebugEnabled()) {
+            Main.debug("checkCurve {0} {1} {2} {3} {4} {5} {6} {7}", x1, y1, x2, y2, x3, y3, x4, y4);
+        }
         //chkCnt++;
         double dx = x4 - x1;