patch 9.0.1254: calling a method on an interface does not work

Problem:    Calling a method on an interface does not work.
Solution:   At runtime figure out what method to call. (closes #11901)
diff --git a/src/version.c b/src/version.c
index 08947ca..a6534c2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1254,
+/**/
     1253,
 /**/
     1252,