[SCSI] mpt fusion: Don't oops if NumPhys==0

Don't oops if NumPhys==0, instead return -ENODEV.
This patch fixes http://bugzilla.kernel.org/show_bug.cgi?id=9909

Signed-off-by: Krzysztof Piotr Oledzki <ole@ans.pl>

diff -Nur a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
--- a/drivers/message/fusion/mptsas.c	2007-10-09 22:31:38.000000000 +0200
+++ b/drivers/message/fusion/mptsas.c	2008-02-10 17:38:51.000000000 +0100
@@ -1772,6 +1772,11 @@
 	if (error)
 		goto out_free_consistent;
 
+	if (!buffer->NumPhys) {
+		error = -ENODEV;
+		goto out_free_consistent;
+	}
+
 	/* save config data */
 	port_info->num_phys = buffer->NumPhys;
 	port_info->phy_info = kcalloc(port_info->num_phys,