failOnError fails without any linting errors

[brphelps]

\node_modules\gulp-sass-lint\index.js:93
if (file.sassLint[0].errorCount > 0) {
^

TypeError: Cannot read property '0' of undefined
at DestroyableTransform._transform (\node_modules\gulp-sass-lint\index.js:93:22)

running latest on sass-lint and gulp-sass-lint.

[brphelps]

Some more context on this -- This happens when individual files were excluded from an earlier sass-lint pass, but still end up flowing through the pipe to .failOnError(). It seems like it would be pretty easy to either (a) 'skip' files if you don't see a .sassLint tracking property on them, or (b) throw a more meaningful error that would explain the cause of the issue to callers. I personally would lean towards (a) as I don't think there's a good reason for consumers to have to be aware of how gulp-sass-lint captures these details internally.