Ranges of 0 width cannot intersect (Fixes bug #3717)

diff --git a/openbox/geom.h b/openbox/geom.h
index 7c5ee32e31047643cbe0544072f0f419d3874967..6a1725e868050b2728abfe665eda783fa8bbc3ea 100644 (file)
--- a/openbox/geom.h
+++ b/openbox/geom.h
@@ -160,6 +160,6 @@ typedef struct _StrutPartial {
      (s1).bottom_end == (s2).bottom_end)
 
 #define RANGES_INTERSECT(r1x, r1w, r2x, r2w) \
-    (r1x < r2x + r2w && r1x + r1w > r2x)
+    (r1w && r2w && r1x < r2x + r2w && r1x + r1w > r2x)
 
 #endif