Three-fixes-in-one:

#5417: Only Shadow material gave shadow outside of Spot bundle
#5414: Material Nodes: sockets without input were always treated as single
       value inputs, ignoring color or vector. (Caused by commit to do
       automatic conversions of socket links).
#5420: When reading with old Blender a new file that has a new window type,
       saving it over, and read back in current Blender, the window type
       should be reset to EMPTY, because all its data got lost.

1 files changed, 5 insertions, 1 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 0f087064a6a..3bd3999b3ae 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -3678,12 +3678,16 @@ static void direct_link_screen(FileData *fd, bScreen *sc)
 		link_list(fd, &(sa->spacedata));
 		link_list(fd, &(sa->panels));
 
+		/* accident can happen when read/save new file with older version */
+		if(sa->spacedata.first==NULL)
+			sa->spacetype= SPACE_EMPTY;
+		
 		for(pa= sa->panels.first; pa; pa=pa->next) {
 			pa->paneltab= newdataadr(fd, pa->paneltab);
 			pa->active= 0;
 			pa->sortcounter= 0;
 		}
-
+		
 		for (sl= sa->spacedata.first; sl; sl= sl->next) {
 			if (sl->spacetype==SPACE_VIEW3D) {
 				View3D *v3d= (View3D*) sl;