patch 9.1.0885: style of sign.c can be improved

Problem:  style of sign.c can be improved
Solution: Refactor code (Luca Saccarola)

Purpose of this commit is:
- separate clearly sections of code
- declare variables at the lowest scope possible
- initialize all variables

closes: #16092

Signed-off-by: Luca Saccarola <github.e41mv@aleeas.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    885,
 /**/
     884,
 /**/