virt-install: don't fail on storage pools without targets.

(crobinso: Add Tom to AUTHORS)

Author: tomlanyon

AUTHORS

@@ -74,6 +74,7 @@ Patches also received from
     Martin Kletzander <mkletzan-at-redhat-dot-com>
     Chen Hanxiao <chenhanxiao-at-cn-dot-fujitsu-dot-com>
     David Shane Holden <dpejesh@yahoo.com>
+    Tom Lanyon <tom@oneshoeco.com>
 
     ...send patches and get your name here...
 

virtinst/util.py

@@ -545,7 +545,7 @@ def lookup_pool_by_path(conn, path):
     def check_pool(poolname, path):
         pool = conn.storagePoolLookupByName(poolname)
         xml_path = get_xml_path(pool.XMLDesc(0), "/pool/target/path")
-        if os.path.abspath(xml_path) == path:
+        if xml_path is not None and os.path.abspath(xml_path) == path:
             return pool
 
     running_list = conn.listStoragePools()