Fix crash opening some 2.4x .blend files with drivers or NLA editor

For example, outlinertest.blend from test240.zip.

2 files changed, 4 insertions, 2 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index c49808c3718..5a6324eb8e1 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -2527,7 +2527,9 @@ static void direct_link_ipo(BlendDataReader *reader, Ipo *ipo)
       /* Undo generic endian switching. */
       if (BLO_read_requires_endian_switch(reader)) {
         BLI_endian_switch_int16(&ipo->blocktype);
-        BLI_endian_switch_int16(&icu->driver->blocktype);
+        if (icu->driver != NULL) {
+          BLI_endian_switch_int16(&icu->driver->blocktype);
+        }
       }
     }
   }
diff --git a/source/blender/editors/space_nla/space_nla.c b/source/blender/editors/space_nla/space_nla.c
index 7e3f90b01ba..c6fe1b8539e 100644
--- a/source/blender/editors/space_nla/space_nla.c
+++ b/source/blender/editors/space_nla/space_nla.c
@@ -148,7 +148,7 @@ static void nla_init(struct wmWindowManager *wm, ScrArea *area)
   /* init dopesheet data if non-existent (i.e. for old files) */
   if (snla->ads == NULL) {
     snla->ads = MEM_callocN(sizeof(bDopeSheet), "NlaEdit DopeSheet");
-    snla->ads->source = (ID *)WM_window_get_active_scene(wm->winactive);
+    snla->ads->source = (wm->winactive) ? (ID *)WM_window_get_active_scene(wm->winactive) : NULL;
   }
 
   ED_area_tag_refresh(area);