Add empty 'virtual' .ALL hierarchies as needed.

When using a --checkgroups file while tabulating,
valid but empty groups will be added with a posting
count of zero as needed. If all groups in a
sub-hierarchy are empty, the virtual '.ALL' group
for that sub-hierarchy was not created, though.

If local.test.dummy and local.test.binary were
both empty, both groups were added with a posting
count of '0', but local.test.ALL was not.

Now we loop through all hierarchy elements using
ParseHierarchies and add empty .ALL hierarchies as
needed.

Fixes #49.

Also fixing a typo in some comment. :-)

Signed-off-by: Thomas Hochstein <thh@inter.net>

gatherstats.pl

@@ -132,7 +132,7 @@ foreach my $Month (&ListMonth($Period)) {
     # count postings per group
     my %Postings;
     while (($_) = $DBQuery->fetchrow_array) {
-      # get list oft newsgroups and hierarchies from Newsgroups:
+      # get list of newsgroups and hierarchies from Newsgroups:
       my %Newsgroups = ListNewsgroups($_,$TLH,
                                       $OptCheckgroupsFile ? \%ValidGroups : '');
       # count each newsgroup and hierarchy once
@@ -144,9 +144,16 @@ foreach my $Month (&ListMonth($Period)) {
     # add valid but empty groups if --checkgroups is set
     if (%ValidGroups) {
       foreach (sort keys %ValidGroups) {
+        if (!defined($Postings{$_})) {
+          # expand newsgroup with hierarchies
+          my @Newsgroups = ParseHierarchies($_);
+          # add each empty newsgroup and empty hierarchies, too, as needed
+          foreach (@Newsgroups) {
             if (!defined($Postings{$_})) {
               $Postings{$_} = 0;
               warn (sprintf("ADDED: %s as empty group\n",$_));
+            };
+          };
         }
       };
     };