X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Finteraction.h;h=8229083f860f7cf0a7b86e5f4268b9a1551623cf;hb=a0ee1f3ba1dd37945983ea651c98b49b318d3e2f;hp=ec6f88b03b6dc06571a9413d73843b1bfbea97df;hpb=12c7324445fc5fd00d0536172373ddd8b253d0e2;p=pspp

diff --git a/src/math/interaction.h b/src/math/interaction.h
index ec6f88b03b..8229083f86 100644
--- a/src/math/interaction.h
+++ b/src/math/interaction.h
@@ -19,6 +19,7 @@
 #define _INTERACTION_H__ 1
 
 #include <stdbool.h>
+#include "libpspp/compiler.h"
 #include "data/missing-values.h"
 
 struct ccase;
@@ -60,7 +61,8 @@ bool interaction_is_subset (const struct interaction *,
 
 
 unsigned int interaction_case_hash (const struct interaction *,
-                                    const struct ccase *, unsigned int base);
+                                    const struct ccase *,
+				    unsigned int base) WARN_UNUSED_RESULT;
 bool interaction_case_equal (const struct interaction *, const struct ccase *,
                              const struct ccase *);
 bool interaction_case_is_missing (const struct interaction *,