Fix the init value for repl_id of rdbSaveInfo struct (#8026)
Fix the init value for repl_id of rdbSaveInfo struct (#8026)

use 40 zeros rather than 30 zeros to match CONFIG_RUN_ID_SIZE.
this doesn't have any real implications.
JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis