70_ENIGMA2: try some memory garbage collection

git-svn-id: https://svn.fhem.de/fhem/trunk@9738 2b470e98-0d58-463d-a4d8-8e2adae1ed80

fhem/FHEM/70_ENIGMA2.pm

@@ -1076,6 +1076,7 @@ sub ENIGMA2_ReceiveCommand($$$) {
                     KeyAttr        => {}
                 );
                 $return = $parser->XMLin( Encode::encode_utf8($data) );
+                undef $parser;
             }
             else {
                 if ( !defined($cmd) || $cmd eq "" ) {
@@ -2310,6 +2311,7 @@ sub ENIGMA2_ReceiveCommand($$$) {
 
     readingsEndUpdate( $hash, 1 );
 
+    undef $return;
     return;
 }