Skip test_ascii_formatd if _ctypes is not available (BSD, ...).
Previous change was incomplete (r79334).
diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index 6f08e80..ef809fd 100755
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -1406,6 +1406,7 @@
         """,
     'openbsd3':
         """
+        test_ascii_formatd
         test_bsddb
         test_bsddb3
         test_ctypes
@@ -1424,6 +1425,7 @@
         """,
     'netbsd3':
         """
+        test_ascii_formatd
         test_bsddb
         test_bsddb185
         test_bsddb3