Bug#1049394: gosa: Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated

[Mike Gabriel]

Package: src:gosa
Version: 2.8~git20230203.10abe45+dfsg-4
Severity:important

When opening

   <Host> -> Tab: Services -> Service DHCP

I get the below deprecation warning. This we want to hide / fix for  
gosa in stable/testing/unstable:

```
gosa: Deprecated: preg_match(): Passing null to parameter #2  
($subject) of type string is deprecated in  
/usr/share/gosa/include/class_sortableListing.inc on line 458
```

Mike
-- 

mike gabriel aka sunweaver (Debian Developer)
mobile: +49 (1520) 1976 148
landline: +49 (4351) 486 14 27

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