JSCS checker bug fix: minor fallouts from 751afea.

autoload/syntastic/preprocess.vim

@@ -157,9 +157,14 @@ function! syntastic#preprocess#iconv(errors) abort " {{{2
 endfunction " }}}2
 
 function! syntastic#preprocess#jscs(errors) abort " {{{2
-    let out = []
-    let json = s:_decode_JSON(join(a:errors, ''))
+    let errs = join(a:errors, '')
+    if errs ==# ''
+        return []
+    endif
 
+    let json = s:_decode_JSON(errs)
+
+    let out = []
     if type(json) == type({})
         for fname in keys(json)
             if type(json[fname]) == type([])

plugin/syntastic.vim

@@ -19,7 +19,7 @@ if has('reltime')
     lockvar! g:_SYNTASTIC_START
 endif
 
-let g:_SYNTASTIC_VERSION = '3.7.0-67'
+let g:_SYNTASTIC_VERSION = '3.7.0-68'
 lockvar g:_SYNTASTIC_VERSION
 
 " Sanity checks {{{1