C++ doesn't allow variables to be declared without a type, use 'int' as

a default.

cde/programs/dtmail/libDtMail/Common/DtMailRc.C

@@ -1807,7 +1807,7 @@ int DtMail::MailRc::hash_index(char *key)
 {
     register unsigned h;
     register char *s;
-    register c;
+    register int c;
     
     s = key;
     h = 0;