Description:
Hi,

today I wanted to add an IF-Function to a table in document (using LibreOffice Writer) and realized that it is not working. I only get a "Expression is faulty" (in german "Fehlerhafter Ausdruck").

Would be great being able to use all the functions known from Calc in the Writer.

Steps to Reproduce:
1. Add a table to your writer document with some data
2. Add a IF-Function to this table
3. You get an error message

Actual Results:  
Error message

Expected Results:
Working function


Reproducible: Always


User Profile Reset: No


OpenGL enabled: Yes

Additional Info:
Version: 5.4.3.2
Build-ID: 1:5.4.3~rc2-0ubuntu0.16.04.1~lo1
CPU-Threads: 8; Betriebssystem:Linux 4.4; UI-Render: Standard; VCL: gtk2; 
Gebietsschema: de-DE (de_DE.UTF-8); Calc: group


User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0