patch 8.2.2918: builtin function can be shadowed by global variable

Problem:    Builtin function can be shadowed by global variable.
Solution:   Check for builtin function before variable. (Yasuhiro Matsumoto,
            closes #8302)
diff --git a/src/version.c b/src/version.c
index 099d05a..c1fdb64 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2918,
+/**/
     2917,
 /**/
     2916,