gss: fix typo regression in setting minor_status

_gss_secure_release_buffer_set() patch changed minor_status to 0, not
*minor_status as correct. No behavioural change as
_gss_secure_release_buffer_set() would have set it anyway, but obviously this
was unintentional.

lib/gssapi/mech/gss_inquire_cred_by_oid.c

@@ -59,7 +59,7 @@ gss_inquire_cred_by_oid (OM_uint32 *minor_status,
 		m = mc->gmc_mech;
 		if (m == NULL) {
 			_gss_secure_release_buffer_set(minor_status, &set);
-			minor_status = 0;
+			*minor_status = 0;
 			return GSS_S_BAD_MECH;
 		}