ext4: fix copy paste error in ext4_swap_extents()

This bug was found by a static code checker tool for copy paste
problems.

Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 230ca74..97f0fd0 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -5836,7 +5836,7 @@
 			if (e1_blk > lblk1)
 				next1 = e1_blk;
 			if (e2_blk > lblk2)
-				next2 = e1_blk;
+				next2 = e2_blk;
 			/* Do we have something to swap */
 			if (next1 == EXT_MAX_BLOCKS || next2 == EXT_MAX_BLOCKS)
 				goto finish;