Changing wrap option does not take effect immediately

[gwsw]

Steps to reproduce:

1. Run seq 120 | less
2. Type /13 and press Enter. "13" in line 13 is highlighted.
3. Press n. "13" in line 113 is highlighted.
4. Press n. The message "Pattern not found" is displayed.
5. Enter --search-options=w and press Enter.
6. Press n.

Expected: Search should wrap and show line 13. Actual: The message "Pattern not found" is displayed.