Improve handling of undef default
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@ -726,7 +726,7 @@ sub build_optionlist {
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my $opttem = "<option value=\"***value***\"***sel******title***>***name***</option>\n";
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# Force arrayref for default
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$default = [ $default ] unless($default && ref($default) eq "ARRAY");
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$default = [ $default ] if($default && ref($default) ne "ARRAY");
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# Convert default to a hash for faster lookup
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my %selected = ();
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