fixed MinGW warning about NOMINMAX

src/xbus/main.cpp

@@ -3,7 +3,9 @@
  *  License, v. 2.0. If a copy of the MPL was not distributed with this
  *  file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+#ifndef NOMINMAX
 #define NOMINMAX
+#endif
 #include "plugin.h"
 #include "utils.h"
 #include "traffic.h"

src/xbus/plugin.h

@@ -13,7 +13,9 @@
  * Plugin loaded by X-Plane which publishes a DBus service
  */
 
+#ifndef NOMINMAX
 #define NOMINMAX
+#endif
 #include "menus.h"
 
 #pragma push_macro("interface")

src/xbus/service.h

@@ -8,7 +8,9 @@
 
 //! \file
 
+#ifndef NOMINMAX
 #define NOMINMAX
+#endif
 #include "datarefs.h"
 #include "blackmisc/geodesicgrid.h"
 #include <XPLM/XPLMNavigation.h>

src/xbus/traffic.cpp

@@ -3,7 +3,9 @@
  *  License, v. 2.0. If a copy of the MPL was not distributed with this
  *  file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+#ifndef NOMINMAX
 #define NOMINMAX
+#endif
 #include "traffic.h"
 #include "XPMPMultiplayer.h"
 #include <XPLM/XPLMProcessing.h>