Bug 172740 - "use of uninitialized variable" warnings. Patch by gerv; r=bbaetz.

git-svn-id: svn://10.0.0.236/trunk@131299 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/webtools/bugzilla/buglist.cgi

@@ -83,7 +83,7 @@ else {
 }
 
 # Hack to support legacy applications that think the RDF ctype is at format=rdf.
-if ($::FORM{'format'} eq "rdf" && !$::FORM{'ctype'}) { 
+if ($::FORM{'format'} && $::FORM{'format'} eq "rdf" && !$::FORM{'ctype'}) { 
     $::FORM{'ctype'} = "rdf";
     delete($::FORM{'format'});
 }