patch 9.1.1283: quickfix stack is limited to 10 items

Problem:  quickfix and location-list stack is limited to 10 items
Solution: add the 'chistory' and 'lhistory' options to configure a
          larger quickfix/location list stack
          (64-bitman)

closes: #16920

Co-authored-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: 64-bitman <60551350+64-bitman@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/structs.h b/src/structs.h
index 0baf543..78f0a70 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -276,6 +276,8 @@
 #if defined(FEAT_QUICKFIX)
     int		wo_pvw;
 # define w_p_pvw w_onebuf_opt.wo_pvw	// 'previewwindow'
+    long        wo_lhi;
+# define w_p_lhi w_onebuf_opt.wo_lhi    // 'lhistory'
 #endif
 #ifdef FEAT_RIGHTLEFT
     int		wo_rl;