set_cmd can't be nil

still not sure if this is the right way to guard non-string blocks...

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/oxidized/model/model.rb b/lib/oxidized/model/model.rb
index 45de4d7..899b40a 100644
--- a/lib/oxidized/model/model.rb
+++ b/lib/oxidized/model/model.rb
@@ -133,10 +133,10 @@ module Oxidized
         outputs << out
       end
       procs[:pre].each do |pre_proc|
-        outputs.unshift process_cmd_output(instance_eval(&pre_proc), nil)
+        outputs.unshift process_cmd_output(instance_eval(&pre_proc), '')
       end
       procs[:post].each do |post_proc|
-        outputs << process_cmd_output(instance_eval(&post_proc), nil)
+        outputs << process_cmd_output(instance_eval(&post_proc), '')
       end
       outputs
     end