Replaced SimplePie_Misc::array_compress() with the faster, nativer array_values().
Replaced SimplePie_Misc::array_compress() with the faster, nativer array_values().

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