patch 8.2.0796: MS-Windows: compiler can't handle C99 construct in libvterm

Problem:    MS-Windows: compiler can't handle C99 construct in libvterm.
Solution:   Change to C90 construct.
diff --git a/src/version.c b/src/version.c
index 3598f47..fc9a1a0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    796,
+/**/
     795,
 /**/
     794,