fix failure to compile (c'mon guys, remember your #includes :-)

stepmania/src/RageDisplay.cpp

@@ -21,6 +21,9 @@
 #include "SDL_image.h"
 #include "RageFile.h"
 
+// needs to be added to avoid an error
+#include "SDL_SaveJPEG.h"
+
 //
 // Statistics stuff
 //

stepmania/src/SDL_SaveJPEG.cpp

@@ -6,6 +6,8 @@
 
 #include "libjpeg/jpeglib.h"
 
+// Why aren't we including the header to this?
+#include "SDL_SaveJPEG.h"
 
 /* Pull in JPEG library here. */
 #ifdef _XBOX