patch 8.1.1035: prop_remove() second argument is not optional

Problem:    prop_remove() second argument is not optional.
Solution:   Fix argument count.  Use "buf" instead of "curbuf". (closes #4147)
diff --git a/src/version.c b/src/version.c
index 9114570..bee744e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -780,6 +780,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1035,
+/**/
     1034,
 /**/
     1033,