patch 8.0.0915: wrong initialisation of global

Problem:    Wrong initialisation of global.
Solution:   Use INIT().
diff --git a/src/version.c b/src/version.c
index 72701c9..306aeb4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    915,
+/**/
     914,
 /**/
     913,