[Ohrrpgce] SVN: teeemcee/12327 Move some game/custom init boilerplate to new load_gfx_default function

[subversion at HamsterRepublic.com]

teeemcee
2021-09-01 08:27:52 -0700 (Wed, 01 Sep 2021)
151
Move some game/custom init boilerplate to new load_gfx_default function

Removed unnecessary dpage/vpage init in game.bas; they're already initialised.
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U   wip/common.bi
U   wip/common.rbas
U   wip/custom.bas
U   wip/game.bas