fixed log formatter bug

svn path=/trunk/matplotlib/; revision=309

Author: jdh2358

TODO

@@ -368,7 +368,7 @@
 
 -- DONE Todd's nx stuff
 
--- fix object picker and eeg demo
+-- DONE fix object picker and eeg demo
 
 -- DONE axes bg color
 
@@ -378,6 +378,8 @@
 
 -- DONE - pcolor edge color
 
+-- fix log bar - worked on OSX?
+
 -- convert rank 1 arrays as per Flaviu's post
 
 -- email tim log bar code after release