pidgin/pidgin

Fix a typo in Debug/filter.css that was throwing a GWarning

2020-10-26, Gary Kramlich
43f9f757667d
Fix a typo in Debug/filter.css that was throwing a GWarning

Testing Done:
Built, ran, verified the warning was gone.

Reviewed at https://reviews.imfreedom.org/r/173/
subdir('bonjour')
subdir('facebook')
subdir('gg')
subdir('irc')
subdir('jabber')
subdir('novell')
subdir('null')
subdir('sametime')
subdir('silc')
subdir('simple')
subdir('zephyr')