admin: map unset reject_bad_md5 field to nil

The 'reject_bad_md5' field may be of an unknown value
before the monitor is ready, so prepare for it and map
it to 'nil' instead of an empty string.  This hopefully
makes the Ruby API more Ruby-ish.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/mogilefs/admin.rb b/lib/mogilefs/admin.rb
index 289dea6..96a7898 100644
--- a/lib/mogilefs/admin.rb
+++ b/lib/mogilefs/admin.rb
@@ -82,6 +82,8 @@ class MogileFS::Admin < MogileFS::Client
         row["reject_bad_md5"] = true
       when "0"
         row["reject_bad_md5"] = false
+      when ""
+        row["reject_bad_md5"] = nil
       end
     end
   end