Fix compile warnings

Fix compile warnings about cast signedness.

diff --git a/src/pcm/pcm_dmix.c b/src/pcm/pcm_dmix.c
index 1f1a3831c63145abe7c22b92dd9d519277ce3cb9..c171f8e1b4d9cfd5384765ddd0aad24b3b724b06 100644 (file)
--- a/src/pcm/pcm_dmix.c
+++ b/src/pcm/pcm_dmix.c
@@ -226,8 +226,8 @@ static void mix_areas(snd_pcm_direct_t *dmix,
                         * it optimizes the memory accesses for this case
                         */
                        dmix->u.dmix.mix_areas3(size * channels,
-                                       ((char *)dst_areas[0].addr) + 3 * dst_ofs * channels,
-                                       ((char *)src_areas[0].addr) + 3 * src_ofs * channels,
+                                       ((unsigned char *)dst_areas[0].addr) + 3 * dst_ofs * channels,
+                                       ((unsigned char *)src_areas[0].addr) + 3 * src_ofs * channels,
                                        dmix->u.dmix.sum_buffer + (dst_ofs * channels),
                                        3, 3, sizeof(signed int));
                        return;