Fix #47: Only return a diagnostics component if there are actual diagnostics (#51)

* Fix #47: Only return a diagnostics component if there are actual diagnostics

* Update lua/lsp-status/statusline.lua

Fix typo, caught by @dhruvmanila

Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>

Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>

Author: wbthomason

lua/lsp-status/statusline.lua

@@ -14,7 +14,8 @@ local function make_statusline_component(diagnostics_key)
   return function(bufh)
     bufh = bufh or vim.api.nvim_get_current_buf()
     local icon = icons[diagnostics_key] .. config.indicator_separator
-    return (icon or '') .. diagnostics(bufh)[diagnostics_key]
+    local _diagnostics = diagnostics(bufh)[diagnostics_key]
+    if _diagnostics > 0 then return (icon or '') .. diagnostics(bufh)[diagnostics_key] end
   end
 end