D28667: [platforms/x11] Fix valigrind warning copying window icon for windowed mode

[Vlad Zahorodnii]

zzag added inline comments.

INLINE COMMENTS

> davidedmundson wrote in x11windowed_output.cpp:104
> NetIcon.data is non-const
> 
> const_cast would probably be safe as it seems setIcon also does a deep copy, but I'm sure adding that in the code would be frowned upon too

Didn't know that NETIcon::data has type of `unsigned char *`(weird choice). Please disregard my comment.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D28667

To: davidedmundson, #kwin, apol
Cc: zzag, kwin, Orage, cacarry, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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