file: pass error from lseek()

modules/access/file.c

@@ -328,7 +328,8 @@ static int FileSeek (access_t *p_access, uint64_t i_pos)
     p_access->info.i_pos = i_pos;
     p_access->info.b_eof = false;
 
-    lseek (p_access->p_sys->fd, i_pos, SEEK_SET);
+    if (lseek (p_access->p_sys->fd, i_pos, SEEK_SET) == (off_t)-1)
+        return VLC_EGENERIC;
     return VLC_SUCCESS;
 }