ABI break in KNewStuff

[David Edmundson]

>2ad3e66d81b63495a59d012f673af7bd854b53d7 is not included in the latest
KNewStuff release 5.50,

Oh. Thank goodness for people running various CI builds.
@packagers, sorry for the noise

@Jonathan
That's handy. Go ahead and revert.
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