coverity/133845: Negative array index read. (FP)

`find_command(s->ca.cmdchar) >= 0` was established near the start of
normal_execute(). And `unshift_special(&s->ca);` "should" not ever
result in s->ca.cmdchar containing a multibyte char.

So only an assert() is needed here.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/nvim/normal.c b/src/nvim/normal.c
index 9db02de2a6..b17b4c584e 100644
--- a/src/nvim/normal.c
+++ b/src/nvim/normal.c
@@ -1130,6 +1130,7 @@ static int normal_execute(VimState *state, int key)
       start_selection();
       unshift_special(&s->ca);
       s->idx = find_command(s->ca.cmdchar);
+      assert(s->idx >= 0);
     } else if ((nv_cmds[s->idx].cmd_flags & NV_SSS)
                && (mod_mask & MOD_MASK_SHIFT)) {
       start_selection();