patch 7.4.1558
Problem:    It is not easy to find out what windows display a buffer.
Solution:   Add win_findbuf().
diff --git a/src/version.c b/src/version.c
index bed7a46..ac23c50 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1558,
+/**/
     1557,
 /**/
     1556,