Check on width for nvim_open_win failing

[cempassi]

In lua/hover/util.lua, there is a check to see if there is a width, and if not do some things to define one.

hover.nvim/lua/hover/util.lua

Lines 202 to 208 in a173256

	if not width then
	width = 0
	for i, line in ipairs(contents) do
	line_widths[i] = vim.fn.strdisplaywidth(line)
	width = math.max(line_widths[i], width)
	end
	end

I'm currently using Hover with nvim-jdtls.
On java files, on symbols with no return from lsp, width is still at 0, resulting in an error every time I use K with the following message:
Error executing vim.schedule lua callback: ....hover.nvim/lua/hover/async.lua:37: The coroutine failed with this message: .../hover.nvim/lua/hover/util.lua:316: 'width' key must be a positive Integer

vim.lsp.buf.hover() just says 'no information available' with no errors