Deal with the fact that modern compilers assume different scoping rules

Patch from Pascal Stumpf <Pascal.Stumpf@cubes.de>:

So here are all the patches that deal with the fact that modern
compilers assume different scoping rules for variables declared in for
loops.  On Linux, -fpermissive has been added as a compiler flag to
compensate for this old C code, but I think it is the wrong approach.

Sorry, couldn't help sneaking in a || defined(CSRG_BASED) and some casts
needed for other reasons ...

cde/programs/dtmail/dtmail/ComposeCmds.C

@@ -289,8 +289,9 @@ char *
 ComposeFamily::valueToAddrString(DtMailValueSeq & value)
 {
     int max_len = 0;
+    int count;
 
-    for (int count = 0; count < value.length(); count++) {
+    for (count = 0; count < value.length(); count++) {
 	max_len += strlen(*(value[count]));
     }