[AMIGAOS4] Fix vertex4f workaround that was happening to late
[AMIGAOS4] Fix vertex4f workaround that was happening to late

ptitSeb/glshim,ptitSeb/glshim,ptitSeb/glshim,ptitSeb/glshim,ptitSeb/gl4es,ptitSeb/gl4es,ptitSeb/gl4es,ptitSeb/gl4es