fixing pgr_isPlanar pgtap test

pgtap/planar/isPlanar/edge_cases.pg

@@ -50,8 +50,14 @@ PREPARE zeroEdgeTest2 AS
 SELECT *
 FROM pgr_isPlanar('q1');
 
-RETURN QUERY
-SELECT throws_ok('zeroEdgeTest2','XX000','No edges found', '2: throws, since graph is empty');
+IF min_version('3.6.2') THEN
+  RETURN QUERY
+  SELECT throws_ok('zeroEdgeTest2','XX000','No edges found', '2: throws, since graph is empty');
+ELSE
+  RETURN QUERY
+  SELECT set_eq('zeroEdgeTest2',$$VALUES('f'::bool) $$, '2: False, since vertex does not exist');
+END IF;
+
 
 
 -- vertex not present in graph test
@@ -67,8 +73,14 @@ PREPARE vertexNotPresent4 AS
 SELECT *
 FROM pgr_isPlanar('q3');
 
-RETURN QUERY
-SELECT throws_ok('vertexNotPresent4','XX000','No edges found', '2: throws, since graph is empty');
+IF min_version('3.6.2') THEN
+  RETURN QUERY
+  SELECT throws_ok('vertexNotPresent4','XX000','No edges found', '2: throws, since graph is empty');
+ELSE
+  RETURN QUERY
+  SELECT set_eq('vertexNotPresent4',$$VALUES('f'::bool) $$, '4:False, Vertex not present in graph');
+END IF;
+
 
 -- 1 vertex test