Back to the Future bugfix!

When a new space (window) type gets added, older Blender binaries will
crash on reading files saved with such spaces. This breaks the so nice
upward compility on files...  With addition of SpaceTime I got an occasion
to verify & fix that. If Blender detects a non-existant space it will
degrade it to a 3D window now. Tested on a full 2.34 compile.

1 files changed, 9 insertions, 6 deletions

diff --git a/source/blender/src/spacetypes.c b/source/blender/src/spacetypes.c
index 2b7b8de4dce..6509aee6982 100644
--- a/source/blender/src/spacetypes.c
+++ b/source/blender/src/spacetypes.c
@@ -43,6 +43,7 @@
 #include "BIF_gl.h"
 #include "BIF_mywindow.h"
 #include "BIF_screen.h"
+#include "BIF_space.h"
 #include "BIF_spacetypes.h"
 
 /***/
@@ -75,11 +76,11 @@ void spacetype_set_winfuncs(SpaceType *st, SpaceDrawFP draw, SpaceChangeFP chang
 	st->winhandle= handle;
 }
 
-	/***/
+	/* gets SpaceType struct, but also has patch to initialize unknown spacetypes */
 
-static SpaceType *spacetype_from_code(int spacecode)
+static SpaceType *spacetype_from_area(ScrArea *area)
 {
-	switch (spacecode) {
+	switch (area->spacetype) {
 	case SPACE_ACTION:	return spaceaction_get_type();
 	case SPACE_BUTS:	return spacebuts_get_type();
 	case SPACE_FILE:	return spacefile_get_type();
@@ -96,13 +97,15 @@ static SpaceType *spacetype_from_code(int spacecode)
 	case SPACE_VIEW3D:	return spaceview3d_get_type();
 	case SPACE_TIME:	return spacetime_get_type();
 	default:
+		newspace(area, SPACE_VIEW3D);
+		return spaceview3d_get_type();
 		return NULL;
 	}
 }
 
 void scrarea_do_windraw(ScrArea *area)
 {
-	SpaceType *st= spacetype_from_code(area->spacetype);
+	SpaceType *st= spacetype_from_area(area);
 	
 	areawinset(area->win);
 
@@ -118,7 +121,7 @@ void scrarea_do_windraw(ScrArea *area)
 }
 void scrarea_do_winchange(ScrArea *area)
 {
-	SpaceType *st= spacetype_from_code(area->spacetype);
+	SpaceType *st= spacetype_from_area(area);
 
 	areawinset(area->win);
 
@@ -133,7 +136,7 @@ void scrarea_do_winchange(ScrArea *area)
 }
 void scrarea_do_winhandle(ScrArea *area, BWinEvent *evt)
 {
-	SpaceType *st= spacetype_from_code(area->spacetype);
+	SpaceType *st= spacetype_from_area(area);
 
 	areawinset(area->win);