OSV-2022-450 Heap-buffer-overflow in Curl_headers_push

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=47767 Crash type: Heap-buffer-overflow WRITE 5 Crash state: Curlheaderspush Curlclientwrite Curlhttpreadwriteheaders...