Use names for output functions in the form dt_to_*() instead of
write_dt_*() for consistency with the dt_from_*() input functions.
diff --git a/treesource.c b/treesource.c
index 45c039e..e9bbaa5 100644
--- a/treesource.c
+++ b/treesource.c
@@ -144,7 +144,7 @@
 }
 
 
-void write_tree_source(FILE *f, struct boot_info *bi)
+void dt_to_source(FILE *f, struct boot_info *bi)
 {
 	struct reserve_info *re;