Fix integer overflow in _sdsMakeRoomFor (CVE-2021-41099) (#9558)
Fix integer overflow in _sdsMakeRoomFor (CVE-2021-41099) (#9558)

The existing overflow checks handled the greedy growing, but didn't handle
a case where the addition of the header size is what causes the overflow.
antirez/redis,soloestoy/redis,PKRoma/redis,neomantra/redis,PKRoma/redis,ofirluzon/redis,charsyam/redis,antirez/redis,charsyam/redis,oranagra/redis,yossigo/redis,antirez/redis,yossigo/redis,yossigo/redis,neomantra/redis,soloestoy/redis,neomantra/redis,antirez/redis,ofirluzon/redis,ofirluzon/redis,oranagra/redis,ofirluzon/redis,PKRoma/redis,charsyam/redis,neomantra/redis,oranagra/redis,charsyam/redis,yossigo/redis,neomantra/redis,ofirluzon/redis,oranagra/redis,soloestoy/redis,charsyam/redis,oranagra/redis,soloestoy/redis,PKRoma/redis,soloestoy/redis,yossigo/redis,PKRoma/redis