vim-patch:8.2.0115: byte2line() does not work correctly with text properties

Problem:    Byte2line() does not work correctly with text properties. (Billie
            Cleek)
Solution:   Take the bytes of the text properties into account.
            (closes vim/vim#5334)

9df53b62de

Co-authored-by: Bram Moolenaar <Bram@vim.org>

src/nvim/memline.c

@@ -4023,9 +4023,12 @@ int ml_find_line_or_offset(buf_T *buf, linenr_T lnum, int *offp, bool no_ff)
       }
     } else {
       extra = 0;
-      while (offset >= size
-             + text_end - (int)((dp->db_index[idx]) & DB_INDEX_MASK)
-             + ffdos) {
+      while (true) {
+        if (!(offset >= size
+              + text_end - (int)((dp->db_index[idx]) & DB_INDEX_MASK)
+              + ffdos)) {
+          break;
+        }
         if (ffdos) {
           size++;
         }