From e0263b166c8e334c388655373f2144d9bc5184b4 Mon Sep 17 00:00:00 2001
From: Frank Gevaerts <frank@gevaerts.be>
Date: Wed, 23 Dec 2009 21:51:29 +0000
Subject: [PATCH] only get the file pointer if fd is actually valid.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24105 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/common/file.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/firmware/common/file.c b/firmware/common/file.c
index a7facc3d32..75adc8756f 100644
--- a/firmware/common/file.c
+++ b/firmware/common/file.c
@@ -485,13 +485,16 @@ static int readwrite(int fd, void* buf, long count, bool write)
 {
     long sectors;
     long nread=0;
-    struct filedesc* file = &openfiles[fd];
+    struct filedesc* file;
     int rc;
 
     if (fd < 0 || fd > MAX_OPEN_FILES-1) {
         errno = EINVAL;
         return -1;
     }
+
+    file = &openfiles[fd];
+
     if ( !file->busy ) {
         errno = EBADF;
         return -1;