Update redis.c
Update redis.c

aof write error, return error info ffcs branch missing "{}"
FFCSRedisReform/redis_ffcs_src-2.8.19,FFCSRedisReform/redis_ffcs_src-2.8.19,FFCSRedisReform/redis_ffcs_src-2.8.19,FFCSRedisReform/redis_ffcs_src-2.8.19