Fix comparison warning
Fix comparison warning

9prady9/arrayfire,victorv/arrayfire,umar456/arrayfire,hshindo/arrayfire,pentschev/arrayfire,pentschev/arrayfire,bkloppenborg/arrayfire,munnybearz/arrayfire,umar456/arrayfire,marbre/arrayfire,ghisvail/arrayfire,marbre/arrayfire,shehzan10/arrayfire,umar456/arrayfire,shehzan10/arrayfire,9prady9/arrayfire,bkloppenborg/arrayfire,merlin-ext/arrayfire,ghisvail/arrayfire,pentschev/arrayfire,arrayfire/arrayfire,munnybearz/arrayfire,arrayfire/arrayfire,marbre/arrayfire,9prady9/arrayfire,hshindo/arrayfire,marbre/arrayfire,victorv/arrayfire,munnybearz/arrayfire,victorv/arrayfire,arrayfire/arrayfire,hshindo/arrayfire,shehzan10/arrayfire,umar456/arrayfire,victorv/arrayfire,bkloppenborg/arrayfire,ghisvail/arrayfire,hshindo/arrayfire,merlin-ext/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,pentschev/arrayfire,shehzan10/arrayfire,bkloppenborg/arrayfire,ghisvail/arrayfire,merlin-ext/arrayfire,merlin-ext/arrayfire