Fix int overflow in flops calculation
Fix int overflow in flops calculation

arrayfire/arrayfire,9prady9/arrayfire,umar456/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,umar456/arrayfire,arrayfire/arrayfire,umar456/arrayfire,umar456/arrayfire,9prady9/arrayfire,9prady9/arrayfire,arrayfire/arrayfire