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: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 8cacaf6..61fa9e1 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2424,7 +2424,7 @@
 		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);