Fixed XPlane plugin warnings / issues

I came across when first compiling master with latest classes on my place
VC2013

src/plugins/simulator/xplane/simulator_xplane.cpp

@@ -234,6 +234,7 @@ namespace BlackSimPlugin
         void CSimulatorXPlane::addRemoteAircraft(const BlackMisc::Aviation::CCallsign &callsign, const QString &type,
             const BlackMisc::Aviation::CAircraftSituation &initialSituation)
         {
+            Q_UNUSED(initialSituation); // fixed gcc warning
             if (! isConnected()) { return; }
             m_traffic->addPlane(callsign.asString(), type, "YYY", "YYY"); // TODO livery
             //addAircraftSituation(callsign, initialSituation);

src/xbus/traffic.cpp

@@ -84,6 +84,8 @@ namespace XBus
 
     int CTraffic::preferences(const char *section, const char *name, int def)
     {
+        Q_UNUSED(name);
+        Q_UNUSED(section);
         // TODO [planes] max_full_count
         return def;
     }
@@ -91,6 +93,8 @@ namespace XBus
     float CTraffic::preferences(const char *section, const char *name, float def)
     {
         // TODO [planes] full_distance
+        Q_UNUSED(name);
+        Q_UNUSED(section);
         return def;
     }
 

src/xbus/traffic.h

@@ -11,7 +11,7 @@
 #include "datarefs.h"
 #include <QObject>
 #include <QHash>
-#include "XPMPMultiplayer.h"
+#include "include/XPMPMultiplayer.h"
 
 //! \cond PRIVATE
 #define XBUS_TRAFFIC_INTERFACENAME "net.vatsim.xbus.traffic"