Florian Müllner 8842bdfb11 Do not skip CoglError parameters
While CoglError is a define to GError, it doesn't follow the convention
of ignoring errors when NULL is passed, but rather treats the error as
fatal :-(
That's clearly unwanted for a compositor, so make sure to always pass
an error parameter where a runtime error is possible (i.e. any CoglError
that is not a malformed blend string).

https://bugzilla.gnome.org/show_bug.cgi?id=765058
2016-04-15 17:22:24 +02:00
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