Bug in die_on_bad_params handling

For example
Template:

<tmpl_loop name="foo">
  <tmpl_var name="bar">
  <tmpl_var name="baz">
</tmpl_loop>
<tmpl_loop name="foo">
  <tmpl_var name="baz">
</tmpl_loop>

Script:
#!/usr/bin/perl
use HTML::Template;
$t=HTML::Template->new(filename=>'0.tmpl');
@foo=({bar=>1,baz=>2},{bar=>3,baz=>4});
$t->param(foo=>\@foo);
print $t->output;

Result:
HTML::Template->output() : fatal error in loop output : HTML::Template : 
Attempt to set nonexistent parameter 'bar' - this parameter name doesn't 
match any declarations in the template file : (die_on_bad_params => 1) 
at /usr/share/perl5/HTML/Template.pm line 2905
 at 0.pl line 6
 at /usr/share/perl5/HTML/Template.pm line 2613
        HTML::Template::output('HTML::Template=HASH(0x81f283c)') called 
at 0.pl line 6

Obviously, this error is wrong: bar does appear, just not in EVERY 
instance of the loop. I could
turn die_on_bad_params off, but then I don't get help in finding REAL 
errors, and I need it
(because the actual template where I need this is much, much more 
complex than this
example).


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