patch 8.0.1803: warning for uninitialized variable

Problem:    Warning for uninitialized variable. (Tony Mechelynck)
Solution:   Initialize it.
diff --git a/src/version.c b/src/version.c
index 20f3f2f..f0cb293 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1803,
+/**/
     1802,
 /**/
     1801,