Add UP_CAST macro, for safer casting from contained data to its container.

[pspp-builds.git] / src / language / stats / npar.q

diff --git a/src/language/stats/npar.q b/src/language/stats/npar.q
index c8c44e6d4e825b2c96eef9f1689fa9651691e08f..8c6f98f82cf669275376313a03650b9ba5de0ff8 100644 (file)
--- a/src/language/stats/npar.q
+++ b/src/language/stats/npar.q
@@ -32,6 +32,7 @@
 #include <language/stats/chisquare.h>
 #include <language/stats/wilcoxon.h>
 #include <language/stats/sign.h>
+#include <libpspp/cast.h>
 #include <libpspp/hash.h>
 #include <libpspp/pool.h>
 #include <libpspp/taint.h>
@@ -585,7 +586,7 @@ one_sample_insert_variables (const struct npar_test *test,
                             struct const_hsh_table *var_hash)
 {
   int i;
-  struct one_sample_test *ost = (struct one_sample_test *) test;
+  struct one_sample_test *ost = UP_CAST (test, struct one_sample_test, parent);
 
   for ( i = 0 ; i < ost->n_vars ; ++i )
     const_hsh_insert (var_hash, ost->vars[i]);