Completion of error handling

[Markus Elfring]

Hello,

I pointed out that return values from various function calls were
ignored at some places in the source files.
https://bugs.kde.org/buglist.cgi?short_desc=Check+return+codes+everywhere&short_desc_type=allwordssubstr&emailreporter1=1&emailtype1=substring&email1=Markus.Elfring&order=Bug+Number

The following software components were affected.
ark
DVI backend
fish
kcminfo
kdat
kimgio
kiten
kjs
kmail
kmtrace
ksysguard
libindi
libkpgp
metakit plug-in
xine backend

I suggested a few design choices. Which ways are acceptable to fix the
involved details?

Regards,
Markus


 
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