### Description
<!--
On every startup of Kamailio I'm getting an error im my Log when Kamailio is going to
load the globalblacklist table from MySQL Database
I tested this with version 5.4.1 build from git source.
With version 5.3.6 there are no errors like this. I diffed the source of userblacklist.c
and saw some changes in the code. So there may be a bug.
-->
### Troubleshooting
#### Reproduction
<!--
Create a simple config an use check_blacklist()
Use db_mysql as database backend
-->
#### Debugging Data
#### Log Messages
```
Sep 17 07:56:36 voip-lab-proxy03 /usr/sbin/kamailio[553]: DEBUG: <core>
[core/route.c:885]: fix_actions(): fixing check_blacklist()
Sep 17 07:56:36 voip-lab-proxy03 /usr/sbin/kamailio[553]: DEBUG: userblacklist
[userblacklist.c:472]: add_source(): add table globalblacklist
Sep 17 07:56:36 voip-lab-proxy03 /usr/sbin/kamailio[553]: DEBUG: <core>
[dtrie.c:57]: dtrie_init(): allocate 16 bytes for root at 0x7fc29efa4ab0
Sep 17 07:56:36 voip-lab-proxy03 /usr/sbin/kamailio[553]: DEBUG: <core>
[dtrie.c:67]: dtrie_init(): allocate 80 bytes for 10 root children pointer at
0x7fc29efa4b28
Sep 17 07:56:36 voip-lab-proxy03 /usr/sbin/kamailio[553]: ERROR: <core> [db.c:481]:
db_use_table(): invalid parameter value
Sep 17 07:56:36 voip-lab-proxy03 /usr/sbin/kamailio[553]: ERROR: userblacklist [db.c:123]:
db_reload_source(): cannot use db table 'globalblacklist'
Sep 17 07:56:36 voip-lab-proxy03 /usr/sbin/kamailio[553]: ERROR: userblacklist
[userblacklist.c:425]: load_source(): cannot load source from 'globalblacklist'
```
### Additional Information
```
Kamailio 5.4.1
```
* **Operating System**:
```
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
Linux voip-lab-proxy03 4.19.0-10-amd64 #1 SMP Debian 4.19.132-1 (2020-07-24) x86_64
GNU/Linux
```
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