[Bf-blender-cvs] [08cd50dcde5] fracture_modifier: crash fix in updateAccelerationMap, forgot to check for dm being null

[Martin Felke]

Commit: 08cd50dcde5f0b5b98c910f4d3249cd250de6459
Author: Martin Felke
Date:   Wed Jan 3 17:24:32 2018 +0100
Branches: fracture_modifier
https://developer.blender.org/rB08cd50dcde5f0b5b98c910f4d3249cd250de6459

crash fix in updateAccelerationMap, forgot to check for dm being null

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

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

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

diff --git a/source/blender/blenkernel/intern/fracture.c b/source/blender/blenkernel/intern/fracture.c
index a48a1f90953..ee511c0fa24 100644
--- a/source/blender/blenkernel/intern/fracture.c
+++ b/source/blender/blenkernel/intern/fracture.c
@@ -3656,7 +3656,10 @@ void BKE_update_acceleration_map(FractureModifierData *fmd, MeshIsland* mi, Obje
 	MDeformWeight *dw = NULL;
 	float weight = 0.0f, denom;
 	int i = 0, w = 0;
-	int totvert = dm->getNumVerts(dm);
+	int totvert = dm ? dm->getNumVerts(dm) : 0;
+
+	if (!dm)
+		return;
 
 	dvert = dm->getVertDataArray(dm, CD_MDEFORMVERT);