wgengine/magicsock: remove log allocation
This was the whole point but I goofed at the last line.
@@ -1274,7 +1274,7 @@ func (c *Conn) logEndpointChange(endpoints []string, reasons map[string]string)
}
fmt.Fprintf(buf, "%s (%s)", ep, reasons[ep])
}
- c.logf("%s", buf)
+ c.logf("%s", buf.Bytes())
}
// c.mu must be held.
