[oe] [PATCH] Fix random python backtrace in mutlilib handling code.

[Jeremy Puhlman]

newval is not defined in all cases. Set to None and check if it is set.

  File
"/local/foo/builds/x86/layers/openembedded-core/meta/classes/multilib_global.bbclass",
line 90, in preferred_ml_updates(d=<bb.data_smart.DataSmart object at
0xf6fd528c>):
                 if not d.getVar(newname, False):
    >                d.setVar(newname, localdata.expand(newval))
             # Avoid future variable key expansion
UnboundLocalError: local variable 'newval' referenced before assignment
---
 meta/classes/multilib_global.bbclass | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/classes/multilib_global.bbclass b/meta/classes/multilib_global.bbclass
index 67dc72b..11ae268 100644
--- a/meta/classes/multilib_global.bbclass
+++ b/meta/classes/multilib_global.bbclass
@@ -72,6 +72,7 @@ def preferred_ml_updates(d):
             pkg = pkg.replace("virtual/", "")
             virt = "virtual/"
         for p in prefixes:
+            newval = None
             if pkg != "kernel":
                 newval = p + "-" + val
 
@@ -86,7 +87,7 @@ def preferred_ml_updates(d):
 
             # implement alternative multilib name
             newname = localdata.expand("PREFERRED_PROVIDER_" + virt + p + "-" + pkg)
-            if not d.getVar(newname, False):
+            if not d.getVar(newname, False) and newval != None:
                 d.setVar(newname, localdata.expand(newval))
         # Avoid future variable key expansion
         provexp = d.expand(prov)
-- 
2.6.2