Bug 504946: Fix "Use of uninitialized value $strs in split at

Bugzilla/Search.pm line 1038"
r=mkanat, a=mkanat


git-svn-id: svn://10.0.0.236/trunk@260023 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/webtools/bugzilla/.bzrrev

@@ -1 +1 @@
-7075
+7076

mozilla/webtools/bugzilla/Bugzilla/Search.pm

@@ -1048,6 +1048,7 @@ sub GetByWordList {
     my ($field, $strs) = (@_);
     my @list;
     my $dbh = Bugzilla->dbh;
+    return [] unless defined $strs;
 
     foreach my $w (split(/[\s,]+/, $strs)) {
         my $word = $w;