vim-patch:8.0.0423: changing 'cinoptions' does not always work

Problem:    The effect of adding "vim/vim#" to 'cinoptions' is not always removed.
            (David Briscoe)
Solution:   Reset b_ind_hash_comment. (Christian Brabandt, closes vim/vim#1475)

6b64394f34

src/nvim/indent_c.c

@@ -1619,6 +1619,9 @@ void parse_cino(buf_T *buf)
    * while(). */
   buf->b_ind_if_for_while = 0;
 
+  // indentation for # comments
+  buf->b_ind_hash_comment = 0;
+
   for (p = buf->b_p_cino; *p; ) {
     l = p++;
     if (*p == '-')