patch 8.2.3254: win_gettype() does not recognize a quickfix window

Problem:    win_gettype() does not recognize a quickfix window.
Solution:   Add "quickfix" and "loclist". (Yegappan Lakshmanan, closes #8676)
diff --git a/src/evalwindow.c b/src/evalwindow.c
index 737ca7d..f043c6f 100644
--- a/src/evalwindow.c
+++ b/src/evalwindow.c
@@ -953,6 +953,12 @@
     else if (wp == curwin && cmdwin_type != 0)
 	rettv->vval.v_string = vim_strsave((char_u *)"command");
 #endif
+#ifdef FEAT_QUICKFIX
+    else if (bt_quickfix(wp->w_buffer))
+	rettv->vval.v_string = vim_strsave((char_u *)
+		(wp->w_llist_ref != NULL ? "loclist" : "quickfix"));
+#endif
+
 }
 
 /*