Minor vga binary cleanups.
diff --git a/vgasrc/vgaentry.S b/vgasrc/vgaentry.S
index 7802bdb..b99cf6f 100644
--- a/vgasrc/vgaentry.S
+++ b/vgasrc/vgaentry.S
@@ -28,7 +28,9 @@
 _rom_header_entry:
         jmp _optionrom_entry
 _rom_header_checksum:
-        .space 22
+        .byte 0
+_rom_header_other:
+        .space 21
 
 
 /****************************************************************