patch 8.0.1724: declarations cannot be halfway a block

Problem:    Declarations cannot be halfway a block.
Solution:   Move one declaration to check if this works for all compilers.

src/version.c

@@ -762,6 +762,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1724,
 /**/
     1723,
 /**/