dot: error stats reporting on linux netdev

Fixes: 044b2d2 ("ip,ovs: add statistics and link state info")
Signed-off-by: Robin Jarry <[email protected]>

sosviz/output/dot.py

@@ -280,7 +280,7 @@ def phy_iface(self, iface: D, netns: str = ""):
 
         for name, value in iface.get("stats", {}).items():
             tooltips.append(f"{name} {human_readable(value)}")
-            if "RUNNING" in iface["flags"] and name in self.NETDEV_ERRORS:
+            if value and "LOWER_UP" in iface["flags"] and name in self.NETDEV_ERRORS:
                 labels.append(
                     f'<font color="red">{name} {human_readable(value)}</font>'
                 )