FIXED cache/prg errors, probably old plugin

Wasn't working for me and got these errors (translated from polish)

>Error processing function <SNR>53_BufReadPostHook..<SNR>53_UpdateErrors..<SNR
>53_CacheErrors..196..SyntaxCheckers_scss_scss_lint_GetLocList:
>row    1:
>E121: undefined variable: self
>E15: unknown expression: self.makeprgBuild({})
>Error processing function <SNR>53_BufReadPostHook..<SNR>53_UpdateErrors..<SNR
>53_CacheErrors:
>row   25:
>E170: no :endfor
>Error processing function <SNR>53_BufReadPostHook..<SNR>53_UpdateErrors:
>row    8:
>E171: no :endif
>Error processing function <SNR>53_BufReadPostHook:
>row    4:
>E171: no :endif

after a bit of fiddling now it works without an error