Revert "VMX: Some serial ports are not actually connected"

This reverts commit dba04e7f.
This change was unfortunately not correct. We should have been
changing the boolean argument supplied.

src/vmx/vmx.c

@@ -2718,7 +2718,7 @@ virVMXParseSerial(virVMXContext *ctx, virConfPtr conf, int port,
 
     /* vmx:fileName -> def:data.file.path */
     if (virVMXGetConfigString(conf, fileName_name, &fileName, false) < 0) {
-        goto ignore;
+        goto cleanup;
     }
 
     /* vmx:network.endPoint -> def:data.tcp.listen */