fix facebook warning
fix facebook warning

thomaspark/glyphsearch,thomaspark/glyphsearch,muddy-28/glyphsearch,muddy-28/glyphsearch,nayosx/glyphsearch,grimen/glyphsearch,algolia/glyphsearch,jgog/glyphsearch,grimen/glyphsearch,nayosx/glyphsearch,algolia/glyphsearch,jgog/glyphsearch