staging: lustre: lov: avoid infinite loop in lsm_alloc_plain()

In lsm_alloc_plain() use a signed loop index to avoid an infinite loop
in the error path.
Signed-off-by: John L. Hammond <john.hammond@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6872
Reviewed-on: http://review.whamcloud.com/15644Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/lov/lov_ea.c

@@ -81,7 +81,7 @@ struct lov_stripe_md *lsm_alloc_plain(u16 stripe_count)
 	size_t oinfo_ptrs_size, lsm_size;
 	struct lov_stripe_md *lsm;
 	struct lov_oinfo     *loi;
-	unsigned int i;
+	int i;
 
 	LASSERT(stripe_count <= LOV_MAX_STRIPE_COUNT);