Resolve "Image creation bugs with 0 size windows"

Closes #21 (closed)

skais/tests/utils/test_geometry.py

@@ -18,6 +18,13 @@ class TestGeometry(unittest.TestCase):
 
         self.assertListEqual(result, expected)
 
+
+    def test_bresenham_inverted_2(self):
+        result = bresenham(16, 4, 3, 9)
+        expected = [(3, 9), (4, 9), (5, 8), (6, 8), (7, 7), (8, 7), (9, 7), (10, 6), (11, 6), (12, 6), (13, 5), (14, 5),
+                    (15, 4), (16, 4)]
+        self.assertListEqual(result, expected)
+
     def test_bresenham_same_line(self):
         result = bresenham(3, 4, 10, 4)
         expected = [(3, 4), (4, 4), (5, 4), (6, 4), (7, 4), (8, 4), (9, 4), (10, 4)]