undo: don't try to copy a string that doesn't exist

This fixes https://savannah.gnu.org/bugs/?57051. Bug existed since commit d256d0cb from earlier today.
2019-10-13 17:31:53 +02:00 · 2019-10-13 17:31:53 +02:00 · 2656f543f4
parent ba79602281
commit 2656f543f4
1 changed files with 1 additions and 0 deletions
--- a/src/text.c
+++ b/src/text.c
@ -1226,6 +1226,7 @@ void add_undo(undo_type action, const char *message)
 		u->lineno += cutbottom->lineno - cutbuffer->lineno;
 		break;
 	case INSERT:
+		break;
 	case COUPLE_BEGIN:
 		u->mark_begin_lineno = openfile->current_y;
 	case COUPLE_END: