[dw-free] fix warning in LJ::EmbedModule::module_iframe_tag

[fu]

[commit: http://hg.dwscoalition.org/dw-free/rev/20d68b781234]

http://bugs.dwscoalition.org/show_bug.cgi?id=3342

Fix warnings generated by embeds.

Patch by kareila.

Files modified:

• cgi-bin/LJ/EmbedModule.pm

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diff -r 18418924badc -r 20d68b781234 cgi-bin/LJ/EmbedModule.pm
--- a/cgi-bin/LJ/EmbedModule.pm	Thu Dec 16 23:09:15 2010 +0800
+++ b/cgi-bin/LJ/EmbedModule.pm	Thu Dec 16 23:20:44 2010 +0800
@@ -236,7 +236,7 @@ sub module_iframe_tag {
 
     my $journalid = $u->userid;
     $moduleid += 0;
-    my $preview = $opts{preview};
+    my $preview = defined $opts{preview} ? $opts{preview} : '';
 
     # parse the contents of the module and try to come up with a guess at the width and height of the content
     my $content = $class->module_content( moduleid => $moduleid, journalid => $journalid, preview => $preview );
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