patch 9.0.0374: Coverity still complains about dropping sign of character

Problem:    Coverity still complains about dropping sign of character.
Solution:   Add intermediate variable.
diff --git a/src/version.c b/src/version.c
index c768302..e3cb074 100644
--- a/src/version.c
+++ b/src/version.c
@@ -708,6 +708,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    374,
+/**/
     373,
 /**/
     372,