Add failing regression test for non-overlapping polygon intersection (issue #1439)

Author: kashish2710

test/algorithms/overlay/overlay_cases.hpp

@@ -1653,4 +1653,24 @@ static std::string mysql_23023665_13[2] =
     "POLYGON((0 7,-5 6,11 -13,0 7))"
 };
 
+// Issue 1439: non-overlapping polygons reported as full intersection
+static std::string case_1439[2] =
+{
+    "POLYGON((-2.47089026 -86.03059246,"
+    "-1.161944873 146.3030596,"
+    "3.40221214 145.8628015,"
+    "3.024695769 141.949088,"
+    "2.420586453 111.9554564,"
+    "1.208013978 -86.04069936,"
+    "-2.47089026 -86.03059246))",
+    
+    "POLYGON((-6.213278056 -88.01851748,"
+    "-6.207382255 -86.51852906,"
+    "-6.20539951 -86.01408604,"
+    "-2.470873099 -86.02434575,"
+    "-2.472221358 -86.53315586,"
+    "-2.476196085 -88.03315059,"
+    "-6.213278056 -88.01851748))"
+};
+
 #endif // BOOST_GEOMETRY_TEST_OVERLAY_CASES_HPP