ext4: don't increment s_mb_buddies_generated in ext4_mb_release

In ext4_mb_release, we use s_mb_buddies_generated++.  Although
the output is OK, but I don't think we need this extra ++.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

fs/ext4/mballoc.c

@@ -2581,7 +2581,7 @@ int ext4_mb_release(struct super_block *sb)
 				atomic_read(&sbi->s_mb_lost_chunks));
 		printk(KERN_INFO
 		       "EXT4-fs: mballoc: %lu generated and it took %Lu\n",
-				sbi->s_mb_buddies_generated++,
+				sbi->s_mb_buddies_generated,
 				sbi->s_mb_generation_time);
 		printk(KERN_INFO
 		       "EXT4-fs: mballoc: %u preallocated, %u discarded\n",