Better fix for previous commit.
Better fix for previous commit.

chrismcandrew/picturefill,rockmandew/picturefill,scottjehl/picturefill,demateu/picturefill,iancrowther/picturefill,scottjehl/picturefill,samiadelgado/picturefill,rockmandew/picturefill,yubin-huang/picturefill,mcanthony/picturefill,samiadelgado/picturefill,purposeindustries/picturefill,mcanthony/picturefill,albell/picturefill,patrickkettner/picturefill,footiealf/picturefill,purposeindustries/picturefill,ddeveloperr/picturefill,nucliweb/picturefill,demateu/picturefill,guardian/picturefill,yufi113/picturefill,iancrowther/picturefill,patrickkettner/picturefill,ddeveloperr/picturefill,yufi113/picturefill,albell/picturefill,footiealf/picturefill,yubin-huang/picturefill,chrismcandrew/picturefill,guardian/picturefill