vboxDumpDisplay: more indentation reducing

VRDxEnabled is initialized to false. Put the if (VRDxEnabled)
on the top level to reduce nesting.

src/vbox/vbox_common.c

@@ -3398,8 +3398,9 @@ vboxDumpDisplay(virDomainDefPtr def, vboxGlobalData *data, IMachine *machine)
     }
 
     gVBoxAPI.UIMachine.GetVRDxServer(machine, &VRDxServer);
-    if (VRDxServer) {
+    if (VRDxServer)
         gVBoxAPI.UIVRDxServer.GetEnabled(VRDxServer, &VRDxEnabled);
+
     if (VRDxEnabled) {
 
         totalPresent++;
@@ -3438,9 +3439,8 @@ vboxDumpDisplay(virDomainDefPtr def, vboxGlobalData *data, IMachine *machine)
             virReportOOMError();
         }
     }
-        VBOX_RELEASE(VRDxServer);
-    }
 
+    VBOX_RELEASE(VRDxServer);
     VBOX_UTF8_FREE(valueTypeUtf8);
 }