Clear error we don't care about.

apps/ca.c

diff --git a/apps/ca.c b/apps/ca.c
index ac56ce7..f79b582 100644
--- a/apps/ca.c
+++ b/apps/ca.c
@@ -444,6 +444,7 @@
 				BIO_printf(bio_err,"problems opening %s for extra oid's\n",p);
 				ERR_print_errors(bio_err);
 				*/
+				ERR_clear_error();
 				}
 			else
 				{