GP: Revert replace custom function by standard API

Using custom api breaks material at object level

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/editors/gpencil/gpencil_paint.c b/source/blender/editors/gpencil/gpencil_paint.c
index 113950075fc..aa163e02cfe 100644
--- a/source/blender/editors/gpencil/gpencil_paint.c
+++ b/source/blender/editors/gpencil/gpencil_paint.c
@@ -1164,7 +1164,7 @@ static void gp_stroke_newfrombuffer(tGPsdata *p)
 	}
 
 	/* Save material index */
-	gps->mat_nr = BKE_object_material_slot_find_index(p->ob, p->material) - 1;
+	gps->mat_nr = BKE_gpencil_get_material_index(p->ob, p->material) - 1;
 
 	/* calculate UVs along the stroke */
 	ED_gpencil_calc_stroke_uv(obact, gps);
@@ -1616,7 +1616,7 @@ static void gp_init_colors(tGPsdata *p)
 	}
 
 	/* check if the material is already on object material slots and add it if missing */
-	if (BKE_object_material_slot_find_index(p->ob, p->material) == 0) {
+	if (BKE_gpencil_get_material_index(p->ob, p->material) == 0) {
 		BKE_object_material_slot_add(p->bmain, p->ob);
 		assign_material(p->bmain, p->ob, ma, p->ob->totcol, BKE_MAT_ASSIGN_USERPREF);
 	}