Stream: fix XREADGROUP history reading of deleted messages.
Stream: fix XREADGROUP history reading of deleted messages.

This commit fixes #5570. It is a similar bug to one fixed a few weeks
ago and is due to the range API to be called with NULL as "end ID"
parameter instead of repeating again the start ID, to be sure that we
selectively issue the entry with a given ID, or we get zero returned
(and we know we should emit a NULL reply).

pmem/redis,pmem/redis,yossigo/redis,ofirluzon/redis,ctripcorp/redis,ctripcorp/redis,antirez/redis,ofirluzon/redis,antirez/redis,yossigo/redis,charsyam/redis,oranagra/redis,oranagra/redis,PKRoma/redis,soloestoy/redis,oranagra/redis,ctripcorp/redis,antirez/redis,neomantra/redis,yossigo/redis,pmem/redis,PKRoma/redis,PKRoma/redis,antirez/redis,soloestoy/redis,ctripcorp/redis,charsyam/redis,ofirluzon/redis,soveran/redis,charsyam/redis,PKRoma/redis,neomantra/redis,neomantra/redis,yossigo/redis,oranagra/redis,ofirluzon/redis,soveran/redis,PKRoma/redis,charsyam/redis,yossigo/redis,soloestoy/redis,neomantra/redis,neomantra/redis,charsyam/redis,oranagra/redis,soveran/redis,soloestoy/redis,pmem/redis,soveran/redis,ofirluzon/redis,soloestoy/redis