Fix TypeError for inline comments and autofix in max-empty-lines

[ecuplxd]

Clearly describe the bug

if had inline comment in a rule, special -s=sugarss --fix make throw TypeError

Which rule, if any, is the bug related to?

max-empty-lines

What code is needed to reproduce the bug?

a {
  width: 00.1em; // inline comment
}

What stylelint configuration is needed to reproduce the bug?

{
  "rules": {
    "max-empty-lines": 1
  }
}

Which version of stylelint are you using?

13.5.0

How are you running stylelint: CLI, PostCSS plugin, Node.js API?

"CLI with stylelint "**/*.sss" --config myconfig.json -s=sugarss --fix"

Does the bug relate to non-standard syntax (e.g. SCSS, Less etc.)?

sugarss inline comment

What did you expect to happen?

no error throw

What actually happened (e.g. what warnings or errors did you get)?

TypeError: Cannot read property 'replace' of undefined

    at <input css 189>:1:1
    at replaceEmptyLines (lib/rules/max-empty-lines/index.js:175:18)
    at apply (node_modules/lodash/lodash.js:475:27)
    at getChars (node_modules/lodash/lodash.js:5317:16)
    at callback (lib/rules/max-empty-lines/index.js:60:25)
    at callback (node_modules/postcss/lib/container.es6:110:18)
    at Root.each (node_modules/postcss/lib/container.es6:76:16)
    at Root.walk (node_modules/postcss/lib/container.es6:107:17)
    at lib/rules/max-empty-lines/index.js:51:9
    at lib/lintSource.js:210:6
        at Array.map (<anonymous>)

[jeddy3]

Fixed in #4821