Fix for bug 9295: Don't crash when running --hash-password.

Fix on 0.2.4.15-rc; I'm doing this branch against 0.2.3, since we're
considering #9122 for an 0.2.3 backport, and if we do, we should merge
this too.

changes/bug9295

+  o Major bugfixes:
+    - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
+      0.2.4.15-rc. Found by stem integration tests.
+