[PATCH] Remove possible reuse of stale pointer in aic7xxx

Spotted with the source checker from Coverity.com.
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/aic7xxx_old.c

@@ -9243,6 +9243,7 @@ aic7xxx_detect(Scsi_Host_Template *template)
 	    {
               /* duplicate PCI entry, skip it */
 	      kfree(temp_p);
+	      temp_p = NULL;
               continue;
 	    }
 	    current_p = current_p->next;