[Bf-blender-cvs] [baf788d7cd1] master: Fix T51336: Crash on broken file opening.

[Bastien Montagne]

Commit: baf788d7cd1c4006a2f92531bf56cef2f601f75f
Author: Bastien Montagne
Date:   Mon May 22 12:06:38 2017 +0200
Branches: master
https://developer.blender.org/rBbaf788d7cd1c4006a2f92531bf56cef2f601f75f

Fix T51336: Crash on broken file opening.

`screen_findedge()` is not expected to return NULL in that case, but
checking against that does not hurt (we do it in all its other call
cases anyway), better than crashing.

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

M	source/blender/editors/screen/screen_edit.c

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

diff --git a/source/blender/editors/screen/screen_edit.c b/source/blender/editors/screen/screen_edit.c
index 9d74299c10c..7d2b77028fc 100644
--- a/source/blender/editors/screen/screen_edit.c
+++ b/source/blender/editors/screen/screen_edit.c
@@ -766,7 +766,9 @@ static void screen_test_scale(bScreen *sc, int winsize_x, int winsize_y)
 				/* lower edge */
 				const int yval = sa->v2->vec.y - headery_init;
 				se = screen_findedge(sc, sa->v4, sa->v1);
-				select_connected_scredge(sc, se);
+				if (se != NULL) {
+					select_connected_scredge(sc, se);
+				}
 				for (sv = sc->vertbase.first; sv; sv = sv->next) {
 					if (sv != sa->v2 && sv != sa->v3) {
 						if (sv->flag) {
@@ -779,7 +781,9 @@ static void screen_test_scale(bScreen *sc, int winsize_x, int winsize_y)
 				/* upper edge */
 				const int yval = sa->v1->vec.y + headery_init;
 				se = screen_findedge(sc, sa->v2, sa->v3);
-				select_connected_scredge(sc, se);
+				if (se != NULL) {
+					select_connected_scredge(sc, se);
+				}
 				for (sv = sc->vertbase.first; sv; sv = sv->next) {
 					if (sv != sa->v1 && sv != sa->v4) {
 						if (sv->flag) {