no periods in the define name, cleaned up comments

sw/simulator/flight_gear.h

@@ -208,11 +208,11 @@ struct FGNetMiniFDM {
     int32_t warp;                 // offset in seconds to unix time
 };
 
-#if FG_2.4
+#if FG_2_4
 #define FG_NET_GUI_VERSION 7
 #else
 #define FG_NET_GUI_VERSION 8
-#endif //FG_2.4
+#endif /*FG_2_4*/
 
 #define FG_NET_GUI_MAX_TANKS 4
 
@@ -222,21 +222,21 @@ struct FGNetMiniFDM {
 // no longer required. The rest of this struct is based on FG source
 // in src/Network/net_gui.hxx
 
-#if FG_2.4
+#if FG_2_4
 #ifdef __x86_64__
 #pragma pack(push)
 #ifdef __APPLE__
 #pragma pack(4)
 #else
 #pragma pack(8)
-#endif //__APPLE__
-#endif //__x86_64__
-#endif //FG_2.4
+#endif /*__APPLE__*/
+#endif /*__x86_64__*/
+#endif /*FG_2_4*/
 struct FGNetGUI {
   uint32_t version;           // increment when data values change
-#if FG_2.4
+#if FG_2_4
   uint32_t padding1;
-#endif //FG_2.4
+#endif /*FG_2_4*/
 
   // Positions
   double longitude;           // geodetic (radians)
@@ -269,12 +269,12 @@ struct FGNetGUI {
   float course_deviation_deg; // degrees off target course
   float gs_deviation_deg;     // degrees off target glide slope
 };
-#if FG_2.4
+#if FG_2_4
 #ifdef __x86_64__
 #pragma pack(push)
 #pragma pack(pop)
-#endif __x86_64__
-#endif //FG_2.4
+#endif __x86_64__ /*__x86_64__*/
+#endif /*FG_2_4*/
 
 
 extern void net_fdm_dump (struct FGNetFDM* fdm);
@@ -288,4 +288,4 @@ extern void net_gui_dump (struct FGNetGUI* gui);
 extern void net_ctrls_dump(struct FGNetCtrls* ctrls);
 extern void net_ctrls_ntoh(struct FGNetCtrls* ctrls);
 
-#endif /* FLIGHT_GEAR_H */
+#endif /* FLIGHT_GEAR_H */