Change explicit variable name checks into use of dict_class_from_id().

[pspp] / src / expr.h

diff --git a/src/expr.h b/src/expr.h
index 909cf87f1761606857a5480897e9271bde43ff45..5a1da2aef94f9b9ff28cf2b0f2dac6378af0ebd7 100644 (file)
--- a/src/expr.h
+++ b/src/expr.h
@@ -38,7 +38,7 @@ struct ccase;
 union value;
 
 struct expression *expr_parse (int flags);
-double expr_evaluate (struct expression *, struct ccase *, int case_num,
+double expr_evaluate (struct expression *, const struct ccase *, int case_num,
                       union value *);
 void expr_free (struct expression *);