[Ohrrpgce] SVN: teeemcee/10132 hspeak: add missing error when 'variable' or 'subscript' used as express

[subversion at HamsterRepublic.com]

teeemcee
2018-03-14 21:28:06 -0700 (Wed, 14 Mar 2018)
175
hspeak: add missing error when 'variable' or 'subscript' used as expressions.

As a bonus, this also speeds up normalize_flow_control (but that's a neglible
part of the total)
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U   wip/hspeak.exw
U   wip/testgame/autotest.rpg
U   wip/testgame/hstests.hss
U   wip/testgame/interactivetest.rpg
U   wip/testgame/parser_tests.hss