[PATCH] ext3_clear_inode(): avoid kfree(NULL)

Steven Rostedt <rostedt@goodmis.org> points out that `rsv' here is usually
NULL, so we should avoid calling kfree().

Also, fix up some nearby whitespace damage.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/ext3/super.c

@@ -512,6 +512,7 @@ static void ext3_clear_inode(struct inode *inode)
 #endif
 	ext3_discard_reservation(inode);
 	EXT3_I(inode)->i_block_alloc_info = NULL;
+	if (unlikely(rsv))
 		kfree(rsv);
 }