ext4: remove ext4_new_meta_block()

There were only two one callers of the function ext4_new_meta_block(),
which just a very simpler wrapper function around
ext4_new_meta_blocks().  Change those two functions to call
ext4_new_meta_blocks() directly, to save code and stack space usage.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index ea2ce3c..e5b169b44 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -189,9 +189,10 @@
 			struct ext4_extent *ex, int *err)
 {
 	ext4_fsblk_t goal, newblock;
+	unsigned long count = 1;
 
 	goal = ext4_ext_find_goal(inode, path, le32_to_cpu(ex->ee_block));
-	newblock = ext4_new_meta_block(handle, inode, goal, err);
+	newblock = ext4_new_meta_blocks(handle, inode, goal, &count, err);
 	return newblock;
 }