i8257: add missing const

Signed-off-by: NHervé Poussineau <hpoussin@reactos.org>
Message-id: 1453843944-26833-8-git-send-email-hpoussin@reactos.org
Signed-off-by: NJohn Snow <jsnow@redhat.com>

hw/dma/i8257.c

@@ -87,7 +87,7 @@ enum {
 
 static void i8257_dma_run(void *opaque);
 
-static int channels[8] = {-1, 2, 3, 1, -1, -1, -1, 0};
+static const int channels[8] = {-1, 2, 3, 1, -1, -1, -1, 0};
 
 static void i8257_write_page(void *opaque, uint32_t nport, uint32_t data)
 {