GP: Fix unreported segment fault with some old files

In some corner situations for old files, the weights array could not be initialized properly.

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/gpencil_modifier.c b/source/blender/blenkernel/intern/gpencil_modifier.c
index 3c2196afb18..d1c455f64e1 100644
--- a/source/blender/blenkernel/intern/gpencil_modifier.c
+++ b/source/blender/blenkernel/intern/gpencil_modifier.c
@@ -257,6 +257,11 @@ void BKE_gpencil_simplify_stroke(bGPDstroke *gps, float factor)
 	/* first create temp data and convert points to 2D */
 	vec2f *points2d = MEM_mallocN(sizeof(vec2f) * gps->totpoints, "GP Stroke temp 2d points");
 
+	/* for some old files, the weights array could not be initializated */
+	if (gps->dvert == NULL) {
+		gps->dvert = MEM_callocN(sizeof(MDeformVert) * gps->totpoints, "gp_stroke_weights");
+	}
+
 	gpencil_stroke_project_2d(gps->points, gps->totpoints, points2d);
 
 	gpencil_rdp_stroke(gps, points2d, factor);
@@ -271,6 +276,11 @@ void BKE_gpencil_simplify_fixed(bGPDstroke *gps)
 		return;
 	}
 
+	/* for some old files, the weights array could not be initializated */
+	if (gps->dvert == NULL) {
+		gps->dvert = MEM_callocN(sizeof(MDeformVert) * gps->totpoints, "gp_stroke_weights");
+	}
+
 	/* save points */
 	bGPDspoint *old_points = MEM_dupallocN(gps->points);
 	MDeformVert *old_dvert = MEM_dupallocN(gps->dvert);