[wined3d] drawprint tidyup initilization of strided data.

[Ivan Gyurdiev]

After looking at glibc nss code for a while, and also
trying to understand how wined3d/device.c code 
updates pp* variables (it constructs the varname
from a string pattern, and updates it), it is my opinion
that macros are pure evil, and inline functions should
be used everywhere instead.

..that's just my opinion as the "casual observer".