ext4: remove redundant test on unsigned

unsigned i_block cannot be less than 0.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

fs/ext4/inode.c

@@ -341,9 +341,7 @@ static int ext4_block_to_path(struct inode *inode,
 	int n = 0;
 	int final = 0;
 
-	if (i_block < 0) {
-		ext4_warning(inode->i_sb, "ext4_block_to_path", "block < 0");
-	} else if (i_block < direct_blocks) {
+	if (i_block < direct_blocks) {
 		offsets[n++] = i_block;
 		final = direct_blocks;
 	} else if ((i_block -= direct_blocks) < indirect_blocks) {