Fix some nonsense came from LGTM (#9962)

1. Local variable 's' hides a parameter of the same name.
```
int anetTcpAccept(char *err, int s, char *ip, size_t ip_len, int *port) {
    if ((fd = anetGenericAccept(err,s,(struct sockaddr*)&sa,&salen)) == ANET_ERR){}
}
```
Change the parameter name from `s` to `serversock`,
also unified with the header file definition.

2. Comparison is always false because i <= 48.
```
for (i = 0; i < DICT_STATS_VECTLEN-1; i++) {  // i < 49
    (i == DICT_STATS_VECTLEN-1)?">= ":"",  // i == 49
}
```
`i == DICT_STATS_VECTLEN-1` always result false, it is a dead code.

3. Empty block without comment.
`else if (!strcasecmp(opt,"ch")) {}`, add a comment to avoid warnings.

4. Bit field fill of type int should have explicitly unsigned integral, explicitly signed integral, or enumeration type.
Modify `int fill: QL_FILL_BITS;` to `unsigned int fill: QL_FILL_BITS;`

5. The result of this call to reconnectingRedisCommand is not checked for null, but 80% of calls to reconnectingRedisCommand check for null.
Just a cleanup job like others.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/dict.c b/src/dict.c
index 1420055e7..9d96c6c27 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -1154,8 +1154,7 @@ size_t _dictGetStatsHt(char *buf, size_t bufsize, dict *d, int htidx) {
         if (clvector[i] == 0) continue;
         if (l >= bufsize) break;
         l += snprintf(buf+l,bufsize-l,
-            "   %s%ld: %ld (%.02f%%)\n",
-            (i == DICT_STATS_VECTLEN-1)?">= ":"",
+            "   %ld: %ld (%.02f%%)\n",
             i, clvector[i], ((float)clvector[i]/DICTHT_SIZE(d->ht_size_exp[htidx]))*100);
     }