[Ohrrpgce] SVN: teeemcee/8714 Extend gfx_surfaceShrink to support stretching as well, and rename to su

[subversion at HamsterRepublic.com]

teeemcee
2017-05-03 08:17:52 -0700 (Wed, 03 May 2017)
236
Extend gfx_surfaceShrink to support stretching as well, and rename to surface_scale

Removed all the function pointer loading stuff, since this should just become
a wrapper around gfx_surfaceStretch instead of being part of the backend.
---
U   wip/backends.bas
U   wip/surface.bi
U   wip/surface.cpp
U   wip/surface.h