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multi: free sockhash on OOM
This would otherwise leak memory in the error path. Detected by torture test 1540. Closes #4713
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@ -260,6 +260,7 @@ static struct Curl_sh_entry *sh_addentry(struct curl_hash *sh,
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/* make/add new hash entry */
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if(!Curl_hash_add(sh, (char *)&s, sizeof(curl_socket_t), check)) {
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Curl_hash_destroy(&check->transfers);
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free(check);
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return NULL; /* major failure */
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}
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