fix: errors in replacing the first item when array_size is 1, and replacing the last item

cJSON.c

@@ -2313,6 +2313,10 @@ CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON
     }
     if (parent->child == item)
     {
+        if (parent->child->prev == parent->child)
+        {
+            replacement->prev = replacement;
+        }
         parent->child = replacement;
     }
     else
@@ -2324,6 +2328,10 @@ CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON
         {
             replacement->prev->next = replacement;
         }
+        if (replacement->next == NULL)
+        {
+            parent->child->prev = replacement;
+        }
     }
 
     item->next = NULL;