X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FInstrumentation%2Fmk_viii.hxx;h=bf6a2c44476a532ef93771b300704049d37eff08;hb=61812ef4b88f5aa74e9cc0630c84d6fc6b4a51cd;hp=60a3f94588c83593e4396dccc9bcf0f05ee92596;hpb=e48967cb1de18922fb148f05fe56966af917688f;p=flightgear.git

diff --git a/src/Instrumentation/mk_viii.hxx b/src/Instrumentation/mk_viii.hxx
index 60a3f9458..bf6a2c444 100755
--- a/src/Instrumentation/mk_viii.hxx
+++ b/src/Instrumentation/mk_viii.hxx
@@ -32,9 +32,9 @@
 #include <simgear/sound/sample_openal.hxx>
 #include <simgear/structure/subsystem_mgr.hxx>
 
-SG_USING_STD(vector);
-SG_USING_STD(deque);
-SG_USING_STD(map);
+using std::vector;
+using std::deque;
+using std::map;
 
 #include "Airports/runways.hxx"
 #include "Airports/simple.hxx"
@@ -621,7 +621,8 @@ public:
 
     class TerrainClearanceFilter
     {
-      deque< Sample<double> >	samples;
+      typedef deque< Sample<double> > samples_type;
+      samples_type		samples;
       double			value;
 
     public:
@@ -654,7 +655,8 @@ public:
     bool last_landing_gear;
     bool last_real_flaps_down;
 
-    deque< Sample< Parameter<double> > > altitude_samples;
+    typedef deque< Sample< Parameter<double> > > altitude_samples_type;
+    altitude_samples_type altitude_samples;
 
     struct
     {
@@ -745,10 +747,10 @@ public:
 	inline SampleElement (SGSoundSample *sample, double volume = 1.0)
 	  : _sample(sample), _volume(volume) { silence = false; }
 
-	virtual inline void play (double volume) { set_volume(volume); _sample->play_once(); }
-	virtual inline void stop () { _sample->stop(); }
-	virtual inline bool is_playing () { return _sample->is_playing(); }
-	virtual inline void set_volume (double volume) { _sample->set_volume(volume * _volume); }
+        virtual inline void play (double volume) { if (_sample) { set_volume(volume); _sample->play_once(); } }
+	virtual inline void stop () { if (_sample) _sample->stop(); }
+        virtual inline bool is_playing () { return _sample ? _sample->is_playing() : false; }
+	virtual inline void set_volume (double volume) { if (_sample) _sample->set_volume(volume * _volume); }
       };
 
       /////////////////////////////////////////////////////////////////////////