Fix HHVM error #344
Fix HHVM error #344

tomzx/blog.tomrochette.com,gigago/grav,userfrosting/learn,Vivalldi/grav,ccardinaux/grav-test,Silwereth/grav,notklaatu/grav,stell/grav,tomzx/blog.tomrochette.com,JamesPan/gravbox,userfrosting/learn,dimayakovlev/grav,undesign/undesign.github.io,sylvestrelucia/grav,JamesPan/gravbox,TheHiddenHaku/alessiobottiroli-website-grav,joeyhenricks/a-broke-vegan,sylvestrelucia/grav,userfrosting/learn,lennerd/grav,dimayakovlev/grav,sylvestrelucia/grav,Pumpapa/lucaswalters.nl,shortsofia/testesitegrav.github.io,Sommerregen/grav,Pumpapa/chriswalters.nl,tcsizmadia/grav,getgrav/grav,getgrav/grav,Vivalldi/grav,notklaatu/grav,tomzx/blog.tomrochette.com,toovy/grav,Pumpapa/lucaswalters.nl,Pumpapa/jacinthawalters.nl,JamesPan/gravbox,Pumpapa/lucaswalters.nl,tomzx/blog.tomrochette.com,iMoonThailand/grav,undesign/undesign.github.io,userfrosting/learn,joeyhenricks/a-broke-vegan,webuxr/iamrs,JamesPan/gravbox,sylvestrelucia/grav,toovy/grav