[PATCH trivial] chardev/baum.c: fix error return check for windows

[Michael Tokarev]

Commit 3736506e25ac7bb "meson: Fix brlapi compile test for
Windows builds" fixed brlapi configure-time test to use
BRLAPI_INVALID_FILE_DESCRIPTOR instead of -1, b/c on windows,
it is not -1.  But the same test is used at run time when
initing brlapi in chardev/baum.c.  Fix this one too.

Signed-off-by: Michael Tokarev <m...@tls.msk.ru>
---
 chardev/baum.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chardev/baum.c b/chardev/baum.c
index f3e8cd27f0..ecbcd2e5c6 100644
--- a/chardev/baum.c
+++ b/chardev/baum.c
@@ -654,7 +654,7 @@ static void baum_chr_open(Chardev *chr,
     baum->brlapi = handle;
 
     baum->brlapi_fd = brlapi__openConnection(handle, NULL, NULL);
-    if (baum->brlapi_fd == -1) {
+    if (baum->brlapi_fd == BRLAPI_INVALID_FILE_DESCRIPTOR) {
         error_setg(errp, "brlapi__openConnection: %s",
                    brlapi_strerror(brlapi_error_location()));
         g_free(handle);
-- 
2.47.2