[Bf-blender-cvs] [3f53b463676] temp-T101739-fix-seam-bleeding-non-manifold: Fix out of bounds access.

[Jeroen Bakker]

Commit: 3f53b463676d5bd15ed475408edbb21b72f74218
Author: Jeroen Bakker
Date:   Fri Jan 13 14:09:18 2023 +0100
Branches: temp-T101739-fix-seam-bleeding-non-manifold
https://developer.blender.org/rB3f53b463676d5bd15ed475408edbb21b72f74218

Fix out of bounds access.

===================================================================

M	source/blender/blenkernel/intern/pbvh_pixels_copy.cc

===================================================================

diff --git a/source/blender/blenkernel/intern/pbvh_pixels_copy.cc b/source/blender/blenkernel/intern/pbvh_pixels_copy.cc
index 1fc553097f2..74db2c457b6 100644
--- a/source/blender/blenkernel/intern/pbvh_pixels_copy.cc
+++ b/source/blender/blenkernel/intern/pbvh_pixels_copy.cc
@@ -483,9 +483,11 @@ struct Rows {
                                               const CopyPixelGroup &group)
     {
       CopyPixelCommand last_command(group);
-      for (const DeltaCopyPixelCommand &item : Span<const DeltaCopyPixelCommand>(
-               &tile_pixels.command_deltas[group.start_delta_index], group.num_deltas)) {
-        last_command.apply(item);
+      if (group.num_deltas) {
+        for (const DeltaCopyPixelCommand &item : Span<const DeltaCopyPixelCommand>(
+                 &tile_pixels.command_deltas[group.start_delta_index], group.num_deltas)) {
+          last_command.apply(item);
+        }
       }
       return last_command;
     }