Lowered tolerance to fix failing distance test.

django/contrib/gis/tests/distapp/tests.py

@@ -324,7 +324,7 @@ class DistanceTest(TestCase):
         else:
             qs = Interstate.objects.length()
             if oracle: tol = 2
-            else: tol = 5
+            else: tol = 3
             self.assertAlmostEqual(len_m1, qs[0].length.m, tol)
 
         # Now doing length on a projected coordinate system.