1 files changed, 2 insertions, 3 deletions
diff --git a/dda.c b/dda.c
index e6fe822..033be52 100644
--- a/dda.c
+++ b/dda.c
@@ -86,6 +86,7 @@ dda (test_data_t *testdata)
     double dy = (y1 - y0);
     int yi = next_sample_y (y0);
     int xi = next_sample_x (x0);
+    int bottom = next_sample_y (y1);
     double e = (sample_to_pos (xi) - x0) * dy - (sample_to_pos (yi) - y0) * dx;
     double delta_e_big_x, delta_e_big_y;
     double delta_e_small_x, delta_e_small_y;
@@ -95,7 +96,7 @@ dda (test_data_t *testdata)
     delta_e_big_y = BIG_STEP_Y * dx;
     delta_e_small_y = SMALL_STEP_Y * dx;
 
-    while (yi < next_sample_y (y1))
+    while (yi < bottom)
     {
 	if (dx >= 0)
 	{
@@ -166,9 +167,7 @@ main ()
 {
     int i;
     for (i = 0; i < sizeof testdata / sizeof testdata[0]; ++i)
-    {
 	dda (&(testdata[i]));
-    }
 
     return 0;
 }