sdl: Fixes for the SDL apps, so they support building simulator on Windows

Change-Id: I277d391482a80e5bf9dd8049cd3b78c5cae7205e

apps/plugins/sdl/progs/duke3d/Engine/src/filesystem.h

@@ -42,6 +42,7 @@ void     setGameDir(char* gameDir);
 
 int32_t  TCkopen4load(const char  *filename, int32_t readfromGRP);
 
+#define filelength rb_filelength
 int32_t  filelength(int32_t fd);
 
 #endif

apps/plugins/sdl/progs/duke3d/Game/src/global.h

@@ -12,6 +12,11 @@
 #include "SDL.h"
 
 #define open rb->open
+#define strlwr duke_strlwr
+#define strupr duke_strupr
+#define itoa duke_itoa
+#define ltoa duke_ltoa
+#define ultoa duke_ultoa
 
 void FixFilePath(char  *filename);
 int FindDistance3D(int ix, int iy, int iz);

apps/plugins/sdl/progs/wolf3d/wl_def.h

@@ -17,6 +17,8 @@
 #define read(a, b, c) rb->read((a), (b), (c))
 #define write(a, b, c) rb->write((a), (b), (c))
 #define close(a) rb->close(a)
+#define itoa wolf3d_itoa
+#define ltoa wolf3d_ltoa
 
 #if !defined O_BINARY
 #	define O_BINARY 0