patch 9.0.0256: compiler warning for uninitialized variables

Problem:    Compiler warning for uninitialized variables.
Solution:   Initilize the variables.
diff --git a/src/version.c b/src/version.c
index 17ea79e..ec2f360 100644
--- a/src/version.c
+++ b/src/version.c
@@ -732,6 +732,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    256,
+/**/
     255,
 /**/
     254,