[rhel7/blivet] prevent traceback when root device is not defined #rhbz883768

[Samantha N. Bueno]

root defined as None was causing tracebacks when attempts to
determine root device's properties were run later in sanityCheck

resolves: rhbz#883768
---
 blivet/__init__.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/blivet/__init__.py b/blivet/__init__.py
index 9dc7f23..f7f03c2 100644
--- a/blivet/__init__.py
+++ b/blivet/__init__.py
@@ -1412,6 +1412,7 @@ class Blivet(object):
             errors.append(_("You have not defined a root partition (/),
"
                             "which is required for installation of %s "
                             "to continue.") % (productName,))
+            return (errors, warnings)

if root and root.size < 250:
             warnings.append(_("Your root partition is less than 250 "
--
1.7.11.7