device independent VGA screen dump


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@668 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/vl.h b/vl.h
index 50e1609..11d7aba 100644
--- a/vl.h
+++ b/vl.h
@@ -136,6 +136,7 @@
 int vga_initialize(DisplayState *ds, uint8_t *vga_ram_base, 
                    unsigned long vga_ram_offset, int vga_ram_size);
 void vga_update_display(void);
+void vga_screen_dump(const char *filename);
 
 /* sdl.c */
 void sdl_display_init(DisplayState *ds);