patch 8.0.1155: Ruby command triggers a warning

Problem:    Ruby command triggers a warning when RUBYOPT is set to "-w".
Solution:   use "-e_=0" instead of "-e0". (Masataka Pocke Kuwabara, closes
            #2143)
diff --git a/src/version.c b/src/version.c
index d38664c..ba4f56a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1155,
+/**/
     1154,
 /**/
     1153,