more work on the Linux stuff, though nothing's working yet

src/arch/LoadingWindow/LoadingWindow_GtkModule.h

@@ -1,9 +1,12 @@
 #ifndef LOADING_WINDOW_MODULE_GTK
 #define LOADING_WINDOW_MODULE_GTK
 
+struct RageSurface;
+
 typedef const char *(*INIT)(int *argc, char ***argv);
 typedef void (*SHUTDOWN)();
 typedef void (*SETTEXT)( const char *s );
+typedef void (*SETICON)( const RageSurface *pSrcImg );
 typedef void (*SETSPLASH)( const char *s );
 typedef void (*SETPROGRESS)( int progress, int totalWork );
 typedef void (*SETINDETERMINATE)( bool indeterminate );