Fixes ZPOPMIN/ZPOPMAX wrong replies when count is 0 with non-zset (#9711)

Moves ZPOP ... 0 fast exit path after type check to reply with
WRONGTYPE. In the past it will return an empty array.

Also now count is not allowed to be negative.

see #9680

before:
```
127.0.0.1:6379> set zset str
OK
127.0.0.1:6379> zpopmin zset 0
(empty array)
127.0.0.1:6379> zpopmin zset -1
(empty array)
```

after:
```
127.0.0.1:6379> set zset str
OK
127.0.0.1:6379> zpopmin zset 0
(error) WRONGTYPE Operation against a key holding the wrong kind of value
127.0.0.1:6379> zpopmin zset -1
(error) ERR value is out of range, must be positive
```

0 files changed, 0 insertions, 0 deletions