Remove more cruft leftover from nb_coerce.  Rename nb_coerce to
nb_reserved.
diff --git a/PC/_winreg.c b/PC/_winreg.c
index a1af710..5e5f2e5 100644
--- a/PC/_winreg.c
+++ b/PC/_winreg.c
@@ -430,7 +430,7 @@
 	PyHKEY_binaryFailureFunc,	/* nb_and */
 	PyHKEY_binaryFailureFunc,	/* nb_xor */
 	PyHKEY_binaryFailureFunc,	/* nb_or */
-	NULL,				/* nb_coerce */
+	0,				/* nb_reserved */
 	PyHKEY_intFunc,			/* nb_int */
 	PyHKEY_unaryFailureFunc,	/* nb_long */
 	PyHKEY_unaryFailureFunc,	/* nb_float */