Add FoldCond as a stub. Change cond constant to -1. Add support for EXPR.

(EXPR as a statement, not as a general 'expression')

lslopt/lslparse.py

@@ -1336,7 +1336,7 @@ class parser(object):
         value = self.Parse_expression()
         self.expect(';')
         self.NextToken()
-        return value
+        return {'nt':'EXPR', 't':value['t'], 'ch':[value]}
 
     def Parse_code_block(self, ReturnType, AllowStSw = False):
         """Grammar parsed here: