Unmount partitions after restore (except for CACHE:).
Wipe sd-ext on data wipe.
Fix bug where wiping SDEXT: did not work.
diff --git a/recovery.c b/recovery.c
index 5743bd3..6972564 100644
--- a/recovery.c
+++ b/recovery.c
@@ -385,6 +385,7 @@
     device_wipe_data();
     erase_root("DATA:");
     erase_root("CACHE:");
+    erase_root("SDEXT:");
     ui_print("Data wipe complete.\n");
 }