patch 8.0.1726: older MSVC doesn't support declarations halfway a block

Problem:    Older MSVC doesn't support declarations halfway a block.
Solution:   Move the declaration back to the start of the block.
diff --git a/src/version.c b/src/version.c
index f3143fe..ba093c5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -763,6 +763,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1726,
+/**/
     1725,
 /**/
     1724,