vim-patch:9.0.1311: Coverity warns for using a NULL pointer

Problem:    Coverity warns for using a NULL pointer.
Solution:   Use "empty_option" instead of NULL.

https://github.com/vim/vim/commit/339e114d70de3ec2b36edf37d7ba7a7cfdf9d1a6

N/A patches for version.c:

vim-patch:9.0.1405: missing check for out-of-memory

Problem:    Missing check for out-of-memory.
Solution:   Check for alloc() returning NULL pointer. (closes vim/vim#12149)

https://github.com/vim/vim/commit/14338024c131b71a337c2bb87cb5904f5a5782b8

1 files changed, 3 insertions, 0 deletions

diff --git a/src/nvim/option.c b/src/nvim/option.c
index e6b41d63d0..69e7bb4b21 100644
--- a/src/nvim/option.c
+++ b/src/nvim/option.c
@@ -1207,6 +1207,9 @@ static void do_set_option_string(int opt_idx, int opt_flags, char **argp, int ne
 
   // Set the new value.
   *(char **)(varp) = newval;
+  if (newval == NULL) {
+    *(char **)(varp) = empty_option;
+  }
 
   // origval may be freed by did_set_string_option(), make a copy.
   char *saved_origval = (origval != NULL) ? xstrdup(origval) : NULL;