patch 9.0.1194: compiler warning for comparing pointer with int

Problem:    Compiler warning for comparing pointer with int.
Solution:   Change NULL to zero.
diff --git a/src/version.c b/src/version.c
index a483998..65c9e35 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1194,
+/**/
     1193,
 /**/
     1192,