patch 8.2.3470: crash with error in :catch and also in :finally

Problem:    Crash with error in :catch and also in :finally.
Solution:   Only discard an exception if there is one. (closes #8954)
diff --git a/src/version.c b/src/version.c
index d15495e..23b0c36 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3470,
+/**/
     3469,
 /**/
     3468,