approx1 off_grid Error
approx1 off_grid Error

In the singal.py, for arrayfire.approx1, I found that the off_grid format should be float not double.  Therefore I changed it and it now works as expected.

Sorry if this is not proper procedure for fixing bugs, this is my first time reporting bugs on using github.
arrayfire/arrayfire-python,pavanky/arrayfire-python,arrayfire/arrayfire_python