super_intel: imsm_manage_reshape(): Fix potential NULL pointer dereference

If sra == NULL we cannot goto abort, as it would result in calls to
sysfs_set_num() which would dereference sra.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>

super-intel.c

@@ -10521,7 +10521,10 @@ static int imsm_manage_reshape(
 	int degraded = 0;
 	int source_layout = 0;
 
-	if (!fds || !offsets || !sra)
+	if (!sra)
+		return ret_val;
+
+	if (!fds || !offsets)
 		goto abort;
 
 	/* Find volume during the reshape */