More safety checks.

Author: lcd047

autoload/syntastic/util.vim

@@ -377,6 +377,10 @@ function! s:_rmrf(what) " {{{2
     endif
 
     if getftype(a:what) ==# 'dir'
+        if filewritable(a:what) != 2
+            return
+        endif
+
         for f in split(globpath(a:what, '*', 1), "\n")
             call s:_rmrf(f)
         endfor

plugin/syntastic.vim

@@ -19,7 +19,7 @@ if has('reltime')
     lockvar! g:_SYNTASTIC_START
 endif
 
-let g:_SYNTASTIC_VERSION = '3.5.0-147'
+let g:_SYNTASTIC_VERSION = '3.5.0-148'
 lockvar g:_SYNTASTIC_VERSION
 
 " Sanity checks {{{1