Eliminate dependency of flight.hxx on model.hxx, to avoid unnecessary

rebuilding.

src/FDM/LaRCsim.cxx

@@ -25,9 +25,12 @@
 #include <simgear/constants.h>
 #include <simgear/debug/logstream.hxx>
 
+
 #include <Main/fg_props.hxx>
 #include <Aircraft/aircraft.hxx>
 #include <Controls/controls.hxx>
+#include <Model/model.hxx>
+#include <Main/location.hxx>
 #include <FDM/flight.hxx>
 #include <FDM/LaRCsim/ls_cockpit.h>
 #include <FDM/LaRCsim/ls_generic.h>
@@ -39,6 +42,7 @@
 #include "IO360.hxx"
 #include "LaRCsim.hxx"
 
+
 FGLaRCsim::FGLaRCsim( double dt ) {
 //     set_delta_t( dt );
 

src/FDM/YASim/YASim.cxx

@@ -4,6 +4,8 @@
 #include <Main/globals.hxx>
 #include <Main/fg_props.hxx>
 #include <Model/acmodel.hxx>
+#include <Model/model.hxx>
+#include <Main/location.hxx>
 
 #include "FGFDM.hpp"
 #include "Atmosphere.hpp"

src/FDM/flight.cxx

@@ -34,6 +34,8 @@
 #include <FDM/LaRCsim/ls_interface.h>
 #include <Main/globals.hxx>
 #include <Main/fg_props.hxx>
+#include <Main/location.hxx>
+#include <Model/model.hxx>
 #include <Model/acmodel.hxx>
 
 #include "flight.hxx"

src/FDM/flight.hxx

@@ -90,11 +90,7 @@
 #include <string>
 
 #include <simgear/constants.h>
-// #include <simgear/timing/timestamp.hxx>
-
 #include <Main/fgfs.hxx>
-#include <Model/model.hxx>
-#include <Main/location.hxx>
 
 SG_USING_STD(list);
 SG_USING_STD(vector);