7935873 conf: handle null pointer in virNetDevVlanFormat

Authored and Committed by Laine Stump 10 years ago
    conf: handle null pointer in virNetDevVlanFormat
    
    Other *Format() functions (e.g. virNetDevBandwidthFormat()) return
    with no action when called with a NULL *Def pointer. This makes
    virNetDevVlanFormat() consistent with that behavior.
    
        
file modified
+2 -2