OSV-2021-1670 Dynamic-stack-buffer-overflow in zend_calc_live_ranges

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=42156 Crash type: Dynamic-stack-buffer-overflow READ 4 Crash state: zendcalcliveranges passtwo zendcompilefuncdecl...