gallium: Fix msvc warning.

diff --git a/src/gallium/auxiliary/util/u_tile.c b/src/gallium/auxiliary/util/u_tile.c
index 853c503f4ff697f3e5c7a51675c36111e3a132fa..00c12badf2e95ab354b70005ed2062452fb6d0ec 100644 (file)
--- a/src/gallium/auxiliary/util/u_tile.c
+++ b/src/gallium/auxiliary/util/u_tile.c
@@ -504,7 +504,7 @@ a8_put_tile_rgba(ubyte *dst,
       for (j = 0; j < w; j++, pRow += 4) {
          unsigned a;
          a = float_to_ubyte(pRow[3]);
-         *dst++ = a;
+         *dst++ = (ubyte) a;
       }
       p += src_stride;
    }