fix.patch

diff --git a/main/streams/cast.c b/main/streams/cast.c
index 238212c745..e9b5152f97 100644
--- a/main/streams/cast.c
+++ b/main/streams/cast.c
@@ -46,7 +46,11 @@ typedef struct {
 
 FILE *fopencookie(void *cookie, const char *mode, cookie_io_functions_t *funcs)
 {
-	return funopen(cookie, funcs->reader, funcs->writer, funcs->seeker, funcs->closer);
+	FILE *file = funopen(cookie, funcs->reader, funcs->writer, funcs->seeker, funcs->closer);
+	if (file) {
+		setvbuf(file, NULL, _IONBF, 0);
+	}
+	return file;
 }
 # define HAVE_FOPENCOOKIE 1
 # define PHP_EMULATE_FOPENCOOKIE 1