[Bf-blender-cvs] [4594cc25ac8] master: Fix T56720: Lattice: crash on setting points_u/v/w from python.

[Bastien Montagne]

Commit: 4594cc25ac8f8c07e62eb32f745be01e9444c2b4
Author: Bastien Montagne
Date:   Sat Sep 8 15:29:39 2018 +0200
Branches: master
https://developer.blender.org/rB4594cc25ac8f8c07e62eb32f745be01e9444c2b4

Fix T56720: Lattice: crash on setting points_u/v/w from python.

One need to check that there is something to free, before trying to free it...

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

M	source/blender/blenkernel/intern/lattice.c

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

diff --git a/source/blender/blenkernel/intern/lattice.c b/source/blender/blenkernel/intern/lattice.c
index 582743acff4..1e99712f47a 100644
--- a/source/blender/blenkernel/intern/lattice.c
+++ b/source/blender/blenkernel/intern/lattice.c
@@ -216,7 +216,9 @@ void BKE_lattice_resize(Lattice *lt, int uNew, int vNew, int wNew, Object *ltOb)
 		lt->typeu = lt->typev = lt->typew = KEY_LINEAR;
 
 		/* prevent using deformed locations */
-		BKE_displist_free(&ltOb->curve_cache->disp);
+		if (ltOb->curve_cache != NULL) {
+			BKE_displist_free(&ltOb->curve_cache->disp);
+		}
 
 		copy_m4_m4(mat, ltOb->obmat);
 		unit_m4(ltOb->obmat);