patch 8.2.3672: build failure with unsigned char

Problem:    Build failure with unsigned char.
Solution:   Use int instead of char.
diff --git a/src/version.c b/src/version.c
index 0686cfa..d1004bb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3672,
+/**/
     3671,
 /**/
     3670,