fix numerous compile errors caused by SG changes

src/Airports/GenAirports850/helipad.cxx

@@ -23,6 +23,7 @@
 #include "runway.hxx"
 #include "debug.hxx"
 
+#include <cstdio>
 #include <stdlib.h>
 
 Helipad::Helipad(char* definition)
@@ -259,4 +260,4 @@ void Helipad::BuildShoulder( tgpolygon_list& rwy_polys,
 
         accum.Add( shoulder );
     }
-}
+}

src/Airports/GenAirports850/linked_objects.cxx

@@ -1,6 +1,7 @@
 #include <simgear/debug/logstream.hxx>
 #include "linked_objects.hxx"
 #include "debug.hxx"
+#include <cstdio>
 
 Windsock::Windsock( char* definition )
 {

src/Airports/GenAirports850/object.cxx

@@ -2,6 +2,7 @@
 #include <simgear/debug/logstream.hxx>
 #include "object.hxx"
 #include "debug.hxx"
+#include <cstdio>
 
 LightingObj::LightingObj( char* definition )
 {

src/Airports/GenAirports850/runway.cxx

@@ -7,6 +7,8 @@
 
 #include <terragear/tg_polygon.hxx>
 
+#include <cstdio>
+
 #include "global.hxx"
 #include "apt_math.hxx"
 #include "beznode.hxx"
@@ -196,4 +198,4 @@ int Runway::BuildBtg( tgpolygon_list& rwy_polys, tglightcontour_list& rwy_lights
     apt_base_polys.push_back( base );
 
     return 0;
-}
+}

src/Airports/GenAirports850/taxiway.cxx

@@ -6,6 +6,8 @@
 
 #include <terragear/tg_shapefile.hxx>
 
+#include <cstdio>
+
 #include "global.hxx"
 #include "apt_math.hxx"
 #include "beznode.hxx"

src/Prep/DemChop/fillvoids.cxx

@@ -118,7 +118,7 @@ int main(int argc, char **argv) {
 	tmp_file.concat(".arr.new.gz");
 	SGPath orig_file(tmp3);
 	orig_file.concat(".arr.gz");
-	rename( tmp_file.str().c_str(), orig_file.str().c_str() );
+        orig_file.rename(tmp_file);
       }
     } else {
       cout << "no voids" << endl;