Fix [#21756] Texture paint "quick edit" sending wrong path on unsaved scenes

* Made it use the temp directory in user preferences when the .blend file hasn't been saved yet
* Made bmain->name (wrapped as bpy.data.filename) contain an empty string when 
there's no .B25.blend and no file saved, rather than "<memory2>".

This is a good candidate for consistent file path api, retrieving temp dirs / project-
specific temp dirs / etc...

1 files changed, 7 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/blender.c b/source/blender/blenkernel/intern/blender.c
index d7f8d73e31f..48fe93af418 100644
--- a/source/blender/blenkernel/intern/blender.c
+++ b/source/blender/blenkernel/intern/blender.c
@@ -287,10 +287,14 @@ static void setup_app_data(bContext *C, BlendFileData *bfd, char *filename)
 	if(G.main->versionfile < 250)
 		do_versions_ipos_to_animato(G.main); // XXX fixme... complicated versionpatching
 	
-	/* in case of autosave or quit.blend, use original filename instead
-	 * use relbase_valid to make sure the file is saved, else we get <memory2> in the filename */
-	if(recover && bfd->filename[0] && G.relbase_valid)
+	if(recover && bfd->filename[0] && G.relbase_valid) {
+		/* in case of autosave or quit.blend, use original filename instead
+		 * use relbase_valid to make sure the file is saved, else we get <memory2> in the filename */
 		filename= bfd->filename;
+	} else if (!G.relbase_valid) {
+		/* otherwise, use an empty string as filename, rather than <memory2> */
+		filename="";
+	}
 	
 	/* these are the same at times, should never copy to the same location */
 	if(G.sce != filename)