Description of problem:

There is a "UnicodeWarning: Unicode unequal comparison failed to convert both arguments to Unicode - interpreting them as being unequal" when updating packages between the "updating" and "cleaning" steps due to comparing a Unicode string to "None".

I do not know Python to assess whether this problem should be fixed in yum or Python but the former seems to much easier (just initialize self.lastmsg to a Unicode empty string).


Version-Release number of selected component (if applicable):

yum-3.2.20-3.fc10.noarch


How reproducible:


Steps to Reproduce:
1. yum update something-updatable
  

Actual results:

| [...]
|   Aktualisieren  : java-1.6.0-openjdk-demo                                                                                                              7/14
| /usr/share/yum-cli/output.py:1140: UnicodeWarning: Unicode unequal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
  if msg != self.lastmsg:
|   Aufräumen     : paps                                                                                                                                 8/14
| [...]


Expected results:

| [...]
|   Aktualisieren  : java-1.6.0-openjdk-demo                                                                                                              7/14
|   Aufräumen     : paps                                                                                                                                 8/14
| [...]