fix(PVS/V1028): prevent possible overflow #16023

Full warning: "Possible overflow. Consider casting operands, not the
result."

https://pvs-studio.com/en/docs/warnings/v1028/

2 files changed, 3 insertions, 3 deletions

diff --git a/src/nvim/marktree.c b/src/nvim/marktree.c
index fd7012e895..39c1e36147 100644
--- a/src/nvim/marktree.c
+++ b/src/nvim/marktree.c
@@ -467,7 +467,7 @@ static mtnode_t *merge_node(MarkTree *b, mtnode_t *p, int i)
     unrelative(x->key[x->n].pos, &x->key[x->n+1+k].pos);
   }
   if (x->level) {
-    memmove(&x->ptr[x->n+1], y->ptr, (size_t)(y->n + 1) * sizeof(mtnode_t *));
+    memmove(&x->ptr[x->n+1], y->ptr, ((size_t)y->n + 1) * sizeof(mtnode_t *));
     for (int k = 0; k < y->n+1; k++) {
       x->ptr[x->n+k+1]->parent = x;
     }
@@ -489,7 +489,7 @@ static void pivot_right(MarkTree *b, mtnode_t *p, int i)
   mtnode_t *x = p->ptr[i], *y = p->ptr[i+1];
   memmove(&y->key[1], y->key, (size_t)y->n * sizeof(mtkey_t));
   if (y->level) {
-    memmove(&y->ptr[1], y->ptr, (size_t)(y->n + 1) * sizeof(mtnode_t *));
+    memmove(&y->ptr[1], y->ptr, ((size_t)y->n + 1) * sizeof(mtnode_t *));
   }
   y->key[0] = p->key[i];
   refkey(b, y, 0);
diff --git a/src/nvim/option.c b/src/nvim/option.c
index 9466e841ce..a8b86ec0a0 100644
--- a/src/nvim/option.c
+++ b/src/nvim/option.c
@@ -3510,7 +3510,7 @@ static char_u *set_chars_option(win_T *wp, char_u **varp, bool set)
           xfree(wp->w_p_lcs_chars.multispace);
         }
         if (multispace_len > 0) {
-          wp->w_p_lcs_chars.multispace = xmalloc((size_t)(multispace_len + 1) * sizeof(int));
+          wp->w_p_lcs_chars.multispace = xmalloc(((size_t)multispace_len + 1) * sizeof(int));
           wp->w_p_lcs_chars.multispace[multispace_len] = NUL;
         } else {
           wp->w_p_lcs_chars.multispace = NULL;