added bochs VBE support


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@602 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/vl.h b/vl.h
index f99aa03..4c2ed6e 100644
--- a/vl.h
+++ b/vl.h
@@ -72,7 +72,7 @@
 
 /* vga.c */
 
-#define VGA_RAM_SIZE (8192 * 1024)
+#define VGA_RAM_SIZE (4096 * 1024)
 
 typedef struct DisplayState {
     uint8_t *data;