Merge pull request #529 from withbeast/patch-2

Update _patch.py

Author: nschloe

src/tikzplotlib/_patch.py

@@ -64,7 +64,7 @@ def _patch_legend(obj, draw_options, legend_type):
 def zip_modulo(*seqs):
     n = max(len(seq) for seq in seqs)
     for i in range(n):
-        yield tuple(seq[i % len(seq)] for seq in seqs)
+        yield tuple((seq[i % len(seq)] if len(seq) != 0 else None) for seq in seqs)
 
 
 def draw_patchcollection(data, obj):