Fix: editing a not encrypted file after a crypted file messed up reading the
text from an undo file.
diff --git a/src/fileio.c b/src/fileio.c
index 1c0ac85..c7a2b74 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -2953,7 +2953,7 @@
}
/* When starting to edit a new file which does not have encryption, clear
* the 'key' option, except when starting up (called with -x argument) */
- else if (newfile && *curbuf->b_p_key && !starting)
+ else if (newfile && *curbuf->b_p_key != NUL && !starting)
set_option_value((char_u *)"key", 0L, (char_u *)"", OPT_LOCAL);
return cryptkey;