captive_rtl_file_mmap(): Fixed mmap(2) error check.

diff --git a/src/libcaptive/rtl/file.c b/src/libcaptive/rtl/file.c
index 63fc433..c821474 100644 (file)
--- a/src/libcaptive/rtl/file.c
+++ b/src/libcaptive/rtl/file.c
@@ -92,7 +92,7 @@ off_t lenoff;
                        fd,
                        0       /* offset */
                        );
-       if (r==NULL) {
+       if (r==MAP_FAILED || r==NULL) {
                g_assert_not_reached();
                goto err_close;
                }