ScriptForge - (SF_Exception) Fix signature in error messages

Basic use ProperCased arguments, Python lowercased ones.
The error messages always displayed the ProperCase notation.

Example:

BEFORE: called both from Basic or Python:
Library :   ScriptForge
Service :   FileSystem
Method :    OpenTextFile
Arguments:  FileName, [IOMode=1], [Create=False], [Encoding="UTF-8"]
A serious error has been detected in your code on argument : FileName
The given file could not be found on your system.
    FileName = /...

AFTER: called from Basic, as above, and from Python:
Library :   ScriptForge
Service :   FileSystem
Method :    OpenTextFile
Arguments:  filename, [iomode=1], [create=False], [encoding="UTF-8"]
A serious error has been detected in your code on argument : filename
The given file could not be found on your system.
    filename = /...

Minor user visibility. No need to cherry-pick to 7.2 branch.

Change-Id: I6938c3149fe883ded97051897c19aca23eadcc58
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/117501
Tested-by: Jean-Pierre Ledure <jp@ledure.be>
Tested-by: Jenkins
Reviewed-by: Jean-Pierre Ledure <jp@ledure.be>

0 files changed, 0 insertions, 0 deletions