patch 7.4.1815
Problem:    Compiler warnings for unused variables. (Ajit Thakkar)
Solution:   Add a dummy initialization. (Yasuhiro Matsumoto)
diff --git a/src/version.c b/src/version.c
index 0d78470..3ecf611 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1815,
+/**/
     1814,
 /**/
     1813,