[Bf-blender-cvs] [a1d05ac2a16] blender-v2.79a-release: Fix T53612: Blender crashes on CleanTracks with 'DELETE_SEGMENTS' and a disabled marker

[Sergey Sharybin]

Commit: a1d05ac2a16014ef016cb7d0ce548391b627e222
Author: Sergey Sharybin
Date:   Mon Jan 8 14:10:50 2018 +0100
Branches: blender-v2.79a-release
https://developer.blender.org/rBa1d05ac2a16014ef016cb7d0ce548391b627e222

Fix T53612: Blender crashes on CleanTracks with 'DELETE_SEGMENTS' and a disabled marker

Simple fix, which is totally safe for 2.79a!

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

M	source/blender/editors/space_clip/tracking_ops.c

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

diff --git a/source/blender/editors/space_clip/tracking_ops.c b/source/blender/editors/space_clip/tracking_ops.c
index 56c240c3d20..53cbfbe5cdd 100644
--- a/source/blender/editors/space_clip/tracking_ops.c
+++ b/source/blender/editors/space_clip/tracking_ops.c
@@ -1865,6 +1865,10 @@ static bool is_track_clean(MovieTrackingTrack *track, int frames, int del)
 		}
 	}
 
+	if (count == 0) {
+		ok = 0;
+	}
+
 	if (del) {
 		MEM_freeN(track->markers);