fs/fat/fat.c: Fix GCC 4.6 build warning

Fix:
fat.c: In function 'fat_register_device':
fat.c:74:19: warning: variable 'info' set but not used
[-Wunused-but-set-variable]

Signed-off-by: Wolfgang Denk <wd@denx.de>

fs/fat/fat.c

@@ -71,7 +71,6 @@ static int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr)
 int fat_register_device (block_dev_desc_t * dev_desc, int part_no)
 {
 	unsigned char buffer[dev_desc->blksz];
-	disk_partition_t info;
 
 	if (!dev_desc->block_read)
 		return -1;
@@ -95,28 +94,32 @@ int fat_register_device (block_dev_desc_t * dev_desc, int part_no)
      defined(CONFIG_CMD_USB) || \
      defined(CONFIG_MMC) || \
      defined(CONFIG_SYSTEMACE) )
-	/* First we assume there is a MBR */
-	if (!get_partition_info(dev_desc, part_no, &info)) {
-		part_offset = info.start;
-		cur_part = part_no;
-	} else if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) ||
-		   (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET], "FAT32", 5) == 0)) {
-		/* ok, we assume we are on a PBR only */
-		cur_part = 1;
-		part_offset = 0;
-	} else {
-		printf("** Partition %d not valid on device %d **\n",
-			part_no, dev_desc->dev);
-		return -1;
+	{
+		disk_partition_t info;
+
+		/* First we assume there is a MBR */
+		if (!get_partition_info(dev_desc, part_no, &info)) {
+			part_offset = info.start;
+			cur_part = part_no;
+		} else if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET],
+				    "FAT", 3) == 0) ||
+			   (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET],
+				    "FAT32", 5) == 0)) {
+			/* ok, we assume we are on a PBR only */
+			cur_part = 1;
+			part_offset = 0;
+		} else {
+			printf("** Partition %d not valid on device %d **\n",
+				part_no, dev_desc->dev);
+			return -1;
+		}
 	}
-
 #else
 	if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) ||
 	    (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET], "FAT32", 5) == 0)) {
 		/* ok, we assume we are on a PBR only */
 		cur_part = 1;
 		part_offset = 0;
-		info.start = part_offset;
 	} else {
 		/* FIXME we need to determine the start block of the
 		 * partition where the DOS FS resides. This can be done