PATCH: do not run multipath stuff when not nescessary

[Hans de Goede <hdegoede redhat com>]

Hi,

While working on dmraid I noticed that the multipath stuff gets run when it 
shouldn't, this is because the test changed in the patch below assumes that not 
has a lower precedence then and, which it has not, so the not only applies to 
one part of the and, making the test wrong.

diff --git a/partedUtils.py b/partedUtils.py
index 2fc553c..cf18324 100644
--- a/partedUtils.py
+++ b/partedUtils.py
@@ -584,7 +584,7 @@ class DiskSet:
     def startMPath(self):
         """Start all of the dm multipath devices associated with the DiskSet."""

-        if not DiskSet.mpList is None and DiskSet.mpList.__len__() > 0:
+        if DiskSet.mpList is None or DiskSet.mpList.__len__() == 0:
             return

         log.debug("starting mpaths")

Regards,

Hans