-Fix syntax error

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@7897 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/sbin/xcatd

@@ -1451,6 +1451,7 @@ sub becomeuser {
     return undef;
 }
 sub populate_site_hash {
+    %::XCATSITEVALS{$_->{key}}=();
     my $sitetab = xCAT::Table->new('site',-create=>0);
     unless ($sitetab) { return; }
     my @records = $sitetab->getAllAttribs(qw/key value/);