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Philip Withnall authored
The macros differ in their handling of NULL values — some macros ignore them and pass through (e.g. G_TYPE_CHECK_INSTANCE_CAST) while others will explicitly emit a warning if passed NULL (e.g. G_TYPE_CHECK_INSTANCE). Document their behaviour, so people don’t end up putting unnecessary NULL checks in their code when doing checked type casts. https://bugzilla.gnome.org/show_bug.cgi?id=735731
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