Fix #730 - Lint files on save even when nothing was fixed

autoload/ale/fix.vim

@@ -77,8 +77,6 @@ function! ale#fix#ApplyFixes(buffer, output) abort
             echoerr 'The file was changed before fixing finished'
             return
         endif
-
-        let l:data.done = 1
     endif
 
     if !bufexists(a:buffer)
@@ -86,6 +84,8 @@ function! ale#fix#ApplyFixes(buffer, output) abort
         call remove(g:ale_fix_buffer_data, a:buffer)
     endif
 
+    let l:data.done = 1
+
     " We can only change the lines of a buffer which is currently open,
     " so try and apply the fixes to the current buffer.
     call ale#fix#ApplyQueuedFixes()