Explicitely sort the elements (tags, attributes) in the generated files

Otherwise, the diff easily become untractable when the a differing
version of Perl is used.

---
 flexml.pl |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: b/flexml.pl
===================================================================
--- a/flexml.pl
+++ b/flexml.pl
@@ -227,7 +227,7 @@ EOT
 sub api_functions { # Print XML application interface functions.
   my ($pre,$post) = @_;
   print "/* XML application entry points. */\n" if @tags;
-  for (@tags) {
+  for (sort @tags) {
     print $pre . "void STag_${tagprefix}$ctag{$_}(void)$post\n" unless $startok{$_};
     print $pre . "void ETag_${tagprefix}$ctag{$_}(void)$post\n" unless $endok{$_};
   }
