Detect pointer arithmetics because of LARGEADDRESSAWARE

PC-Lint can find this kind of problem.

Look at http://gimpel-online.com/MsgRef.html, error code 947:

Subtract operator applied to pointers -- An expression of the form p - q was found where both p and q are pointers. This is of special importance in cases where the maximum pointer can overflow the type that holds pointer differences. For example, suppose that the maximum pointer is 3 Gigabytes -1, and that pointer differences are represented by a long, where the maximum long is 2 Gigabytes -1. Note that both of these quantities fit within a 32 bit word. Then subtracting a small pointer from a very large pointer will produce an apparent negative value in the long representing the pointer difference. Conversely, subtracting a very large pointer from a small pointer can produce a positive quantity.