bugfix: solve some time row is nil

Author: gxt_kt

lua/hlchunk/mods/chunk/init.lua

@@ -165,7 +165,7 @@ function ChunkMod:render(range, opts)
         self.meta.task = LoopTask(function(vt, row, vt_win_col)
             row_opts.virt_text = { { vt, text_hl } }
             row_opts.virt_text_win_col = vt_win_col
-            if api.nvim_buf_is_valid(range.bufnr) and api.nvim_buf_line_count(range.bufnr) > row then
+            if api.nvim_buf_is_valid(range.bufnr) and row ~= nil and api.nvim_buf_line_count(range.bufnr) > row then
                 api.nvim_buf_set_extmark(range.bufnr, self.meta.ns_id, row, 0, row_opts)
             end
         end, "linear", self.conf.duration, virt_text_list, row_list, virt_text_win_col_list)