Updated mediawiki/extensions
Project: mediawiki/extensions/Cite  60a082163432dc9a8efea7a20bdd9b3ca95f21ea

Replace == with isset

The coding conventions suggest avoiding ==,
and for this condition definedness is actually more relevant
than whether the string has any text.

Change-Id: I15b422d3345bf4522e68a17dce9682ff28484559