avoid creating paths with empty 'd' in stitch plan (#363)

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/svg/svg.py b/lib/svg/svg.py
index b1cc91d9..e753243c 100644
--- a/lib/svg/svg.py
+++ b/lib/svg/svg.py
@@ -21,6 +21,9 @@ def color_block_to_point_lists(color_block):
         if not stitch.jump and not stitch.color_change:
             point_lists[-1].append(stitch.as_tuple())
 
+    # filter out empty point lists
+    point_lists = [p for p in point_lists if p]
+
     return point_lists