Fixed a small issue in the compat test.
Fixed a small issue in the compat test.

blat/simplepie,songfj/simplepie,gsnedders/complexpie,Alkarex/simplepie,mblaney/simplepie,Alexia/SimplePie,Alexia/SimplePie,wikidi/simplepie,FreshRSS/simplepie,ropik/simplepie,Alkarex/simplepie,wikidi/simplepie,simplepie/simplepie,songfj/simplepie,barryvdh/simplepie,songfj/simplepie,wikidi/simplepie,barryvdh/simplepie,mblaney/simplepie,FreshRSS/simplepie,Alkarex/simplepie,skyzyx/simplepie,blat/simplepie,barryvdh/simplepie,ropik/simplepie,simplepie/simplepie,blat/simplepie,skyzyx/simplepie