rui314/8cc — pull request #22 by andrewchambers (2014-11-27 00:19:29+00:00)
Title: Pointer comparators and difference match the C standard.

Fixed two issues with pointer operations.
C11 6.5.6.9: Ptr subtraction have type ptrdiff_t.
C11 6.5.8.6, 6.5.9.3: Ptr comparisons have type int.