reiserfs: Fix signedness issues for large file systems

Now that we handle file systems > 8 TB, we end up printing large negative
numbers instead of actual block numbers. This patch fixes those places
to use unsigned ints for block numbers.

Signed-by: Jeff Mahoney <jeffm@suse.com>

include/reiserfs_fs.h

@@ -32,6 +32,8 @@
 #ifndef REISERFSPROGS_FS_H
 #define REISERFSPRIGS_FS_H 
 
+typedef unsigned int blocknr_t;
+
 #ifndef NO_EXTERN_INLINE
 # define extern_inline extern inline
 #else