Fix a bug in wifi_essid().
When an invalid interface name is passed to wifi_essid() it does not close opened sockets.
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@ -77,6 +77,7 @@ wifi_essid(const char *iface)
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wreq.u.essid.pointer = id;
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if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
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warn("Failed to get ESSID for interface %s", iface);
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close(sockfd);
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return NULL;
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}
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