[syslinux:firmware] isolinux: fix type declarations

[syslinux-bot for Matt Fleming]

Commit-ID:  762e47ec70be324b4533932a1fdf8a24c9530de7
Gitweb:     http://www.syslinux.org/commit/762e47ec70be324b4533932a1fdf8a24c9530de7
Author:     Matt Fleming <matt.fleming at intel.com>
AuthorDate: Wed, 19 Jun 2013 16:32:31 +0100
Committer:  Matt Fleming <matt.fleming at intel.com>
CommitDate: Wed, 19 Jun 2013 16:32:31 +0100

isolinux: fix type declarations

and fix the following compiler warnings,

core/isolinux-c.c:19:22: warning: assignment makes pointer from integer without a cast [enabled by default]
core/isolinux-c.c:21:21: warning: assignment makes pointer from integer without a cast [enabled by default]

Signed-off-by: Matt Fleming <matt.fleming at intel.com>

---
 core/isolinux-c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/isolinux-c.c b/core/isolinux-c.c
index 6c9a8f2..8574eac 100644
--- a/core/isolinux-c.c
+++ b/core/isolinux-c.c
@@ -3,11 +3,11 @@
 #include <fs.h>
 
 extern far_ptr_t OrigESDI;
-extern uint64_t Hidden;
+extern const uint64_t *Hidden;
 extern uint16_t BIOSType;
 extern uint16_t bios_cdrom;
 extern uint8_t DriveNumber;
-extern uint8_t spec_packet;
+extern const void *spec_packet;
 
 __export void get_derivative_info(union syslinux_derivative_info *di)
 {