2.5 filebrowser

* bugfix: don't allow parent dir to go beyond root
* bugfix: only attempt to change directory if it exists

New (WIP) feature: autocomplete for directory
* works on TAB
* so far only one level (in current directory)

source/blender/editors/space_file/file_intern.h

@@ -89,6 +89,7 @@ float file_string_width(const char* str);
 float file_font_pointsize();
 void file_change_dir(struct SpaceFile *sfile);
 int file_select_match(struct SpaceFile *sfile, const char *pattern);
+void autocomplete_directory(struct bContext *C, char *str, void *arg_v);
 
 /* file_panels.c */
 void file_panels_register(struct ARegionType *art);