ext4: let ext4_ext_rm_leaf work with EXT_DEBUG defined

The variable 'block' is removed by commit 750c9c47, so use the
replacement ex_ee_block instead.
Signed-off-by: NYongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

fs/ext4/extents.c

@@ -2424,7 +2424,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
 		if (err)
 			goto out;
 
-		ext_debug("new extent: %u:%u:%llu\n", block, num,
+		ext_debug("new extent: %u:%u:%llu\n", ex_ee_block, num,
 				ext4_ext_pblock(ex));
 		ex--;
 		ex_ee_block = le32_to_cpu(ex->ee_block);