patch 8.2.3672: build failure with unsigned char

Problem:    Build failure with unsigned char.
Solution:   Use int instead of char.

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3672,
 /**/
     3671,
 /**/