FGPUIDialog: fix reading from already free'd memory.

[flightgear.git] / src / FDM / YASim / YASim.cxx

diff --git a/src/FDM/YASim/YASim.cxx b/src/FDM/YASim/YASim.cxx
index c21db1e8f179597d9d081e7c6fd9c90f2b125796..d82d14398c0a2628430360ae2f0266a10a956e15 100644 (file)
--- a/src/FDM/YASim/YASim.cxx
+++ b/src/FDM/YASim/YASim.cxx
@@ -32,6 +32,7 @@
 #include "YASim.hxx"
 
 using namespace yasim;
+using std::string;
 
 static const float YASIM_PI = 3.14159265358979323846;
 static const float RAD2DEG = 180/YASIM_PI;
@@ -489,7 +490,7 @@ void YASim::copyFromYASim()
         *SLUG2KG * M2FT*M2FT*M2FT;
     _set_V_equiv_kts(Atmosphere::calcVEAS(v[0], P, T, D)*MPS2KTS);
     _set_V_calibrated_kts(Atmosphere::calcVCAS(v[0], P, T)*MPS2KTS);
-    _set_Mach_number(Atmosphere::calcMach(v[0], T));
+    _set_Mach_number(Atmosphere::calcMach(Math::mag3(v), T));
 
     // acceleration
     Math::vmul33(xyz2ned, s->acc, v);