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ext4_extent: some comments cleanup in ext4_ext_correct_indexes.

--- a/lwext4/ext4_extent.c

+++ b/lwext4/ext4_extent.c

@@ -844,9 +844,8 @@

 	eh = path[depth].header;

 	ex = path[depth].extent;

-	if (ex == NULL || eh == NULL) {

+	if (ex == NULL || eh == NULL)

 		return EIO;

-	}

 	if (depth == 0) {

 		/* there is no tree at all */

@@ -858,9 +857,6 @@

 		return EOK;

 	}

-	/*

-	 * TODO: we need correction if border is smaller than current one

-	 */

 	k = depth - 1;

 	border = path[depth].extent->first_block;

 	path[k].index->first_block = border;