Mesa (17.1): winsys/sw/dri: don't use GNU void pointer arithmetic

[Emil Velikov]

Module: Mesa
Branch: 17.1
Commit: 4e7e903bb39fdd22dea01b410e9ae390c58777ac
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4e7e903bb39fdd22dea01b410e9ae390c58777ac

Author: Emil Velikov <emil.velikov at collabora.com>
Date:   Sun Apr 16 14:39:03 2017 +0100

winsys/sw/dri: don't use GNU void pointer arithmetic

Resolves build issues like the following:

src/gallium/winsys/sw/dri/dri_sw_winsys.c:203:31: error: pointer of type ‘void *’ used in arithmetic [-Werror=pointer-arith]
        data = dri_sw_dt->data + (dri_sw_dt->stride * box->y) + box->x * blsize;
                               ^
src/gallium/winsys/sw/dri/dri_sw_winsys.c:203:62: error: pointer of type ‘void *’ used in arithmetic [-Werror=pointer-arith]
        data = dri_sw_dt->data + (dri_sw_dt->stride * box->y) + box->x * blsize;
                                                              ^

Cc: <mesa-stable at lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>
(cherry picked from commit 309f4067a795219027f523bf0733692e48f2fd58)

---

 src/gallium/winsys/sw/dri/dri_sw_winsys.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/winsys/sw/dri/dri_sw_winsys.c b/src/gallium/winsys/sw/dri/dri_sw_winsys.c
index 94d5092405..00849985d6 100644
--- a/src/gallium/winsys/sw/dri/dri_sw_winsys.c
+++ b/src/gallium/winsys/sw/dri/dri_sw_winsys.c
@@ -200,7 +200,7 @@ dri_sw_displaytarget_display(struct sw_winsys *ws,
 
    if (box) {
        void *data;
-       data = dri_sw_dt->data + (dri_sw_dt->stride * box->y) + box->x * blsize;
+       data = (char *)dri_sw_dt->data + (dri_sw_dt->stride * box->y) + box->x * blsize;
        dri_sw_ws->lf->put_image2(dri_drawable, data,
                                  box->x, box->y, box->width, box->height, dri_sw_dt->stride);
    } else {