Fixed a shameful syntax error

lib/htlogr.pm

     my $DIV_FIELD =";";
     my $DIV_VALUE ="=";
 
-    carp("data must be a hash reference" unless ref $data == 'HASH');
+    carp("data must be a hash reference") unless ref $data == 'HASH';
 
     my @fields;
     foreach (keys %$data) {