The order of elements on a set is undefined

This could lead to change in order, for example, when changing version
of Python. This change ensures the colours are always in the same order.

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/png2sprites.py b/tools/png2sprites.py
index 7528fae..95e6492 100755
--- a/tools/png2sprites.py
+++ b/tools/png2sprites.py
@@ -109,7 +109,7 @@ def main():
             tile = [
                 data[x + i + ((y + j) * w)] for j in range(DEF_H) for i in range(DEF_W)
             ]
-            cols = set([c for c in tile if c != TRANS])
+            cols = sorted(set([c for c in tile if c != TRANS]))
 
             if not cols:
                 continue