Fix bug in half2float conversion
Fix bug in half2float conversion

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