test-tables: fix warning about NULL used in printf

With the simplified asserts, newer gcc is able to (correctly) figure
out that NULL was being passed.

diff --git a/src/shared/test-tables.h b/src/shared/test-tables.h
index bb8177b6492e9e6de27dbe3d0317f935b6607e9a..120dc7f2e9f1f350c83e62491df935ef8595250a 100644 (file)
--- a/src/shared/test-tables.h
+++ b/src/shared/test-tables.h
@@ -27,7 +27,7 @@ static inline void _test_table(const char *name,
                 }
 
                 if (boring < 1 || i == size)
-                        printf("%s: %d → %s → %d\n", name, i, val, rev);
+                        printf("%s: %d → %s → %d\n", name, i, strnull(val), rev);
                 else if (boring == 1)
                         printf("%*s  ...\n", (int) strlen(name), "");