patch 8.2.0337: build fails on a few systems

Problem:    Build fails on a few systems.
Solution:   Use vim_snprintf() instead of snprintf().
diff --git a/src/version.c b/src/version.c
index 06b9511..6c519cb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    337,
+/**/
     336,
 /**/
     335,