[XFS] silence gcc4 warnings. the directory ones are wrong because of

information gcc could not find out (that a directory always has a ..
entry), the others are outright gcc bugs.

SGI-PV: 943511
SGI-Modid: xfs-linux:xfs-kern:200055a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/xfs_ialloc_btree.c

@@ -550,6 +550,13 @@ xfs_inobt_insrec(
 	int			ptr;	/* index in btree block for this rec */
 	xfs_inobt_rec_t		*rp=NULL;	/* pointer to btree records */
 
+	/*
+	 * GCC doesn't understand the (arguably complex) control flow in
+	 * this function and complains about uninitialized structure fields
+	 * without this.
+	 */
+	memset(&nrec, 0, sizeof(nrec));
+
 	/*
 	 * If we made it to the root level, allocate a new root block
 	 * and we're done.