[SCSI] NCR_D700: fix a NULL dereference

The Coverity checker spotted this NULL dereference.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/NCR_D700.c b/drivers/scsi/NCR_D700.c
index e993a7b..577e634 100644
--- a/drivers/scsi/NCR_D700.c
+++ b/drivers/scsi/NCR_D700.c
@@ -218,7 +218,7 @@
 	return 0;
 
  detect_failed:
-	release_region(host->base, 64);
+	release_region(region, 64);
  region_failed:
 	kfree(hostdata);