Update: Add restrict optimization to f_memory functions.

Update: Add restrict optimization to f_memory functions.

The design of the memory operations require that array, used, and size do not point to the same memory address.
Help prevent potential aliasing by adding restrict keyword.
The functions with only a single pointer in its parameters still has the restrict keyword added.

I opted to avoid adding the restrict keyword to some of the append and append all functions.
Those would require more attention before I am certain whether or not they should be allowed to have overlapping addresses.
I think they should not, but just in case, I put doing that on hold.

The callback could also use restrict but I have decided not to do that as well due to the number of files that I will need to change.
I will do this later.