From 71ad1d672f3724426184e799252b87c1d54cb115 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sat, 23 Mar 2019 18:20:32 +0100
Subject: mg2d: use the new transfer API for inter-grid transfers

---
 transfer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'transfer.c')

diff --git a/transfer.c b/transfer.c
index 6c8f614..046d96d 100644
--- a/transfer.c
+++ b/transfer.c
@@ -98,7 +98,7 @@ static int transfer_factors_lagrange(GridTransferContext *ctx, unsigned int dim)
         return -ENOMEM;
 
     for (ptrdiff_t idx_dst = 0; idx_dst < ctx->dst.size[dim]; idx_dst++) {
-        const ptrdiff_t idx_src = scale * idx_dst - (priv->stencil / 2 - 1);
+        const ptrdiff_t idx_src = (ptrdiff_t)(scale * idx_dst) - (priv->stencil / 2 - 1);
         const double coord_dst  = idx_dst * step_dst;
 
         double *fact = priv->fact[dim] + priv->stencil * idx_dst;
-- 
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