From fee18df7912c307e1dbdb646655dfcbfe98c939f Mon Sep 17 00:00:00 2001
From: Alex Mayfield <alexmax2742@gmail.com>
Date: Thu, 9 Mar 2017 20:12:21 -0500
Subject: [PATCH] WriteFile requires 4th parameter

Fixes crashes on certain versions of Windows.
---
 midiproc/main.c  | 3 ++-
 src/i_midipipe.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/midiproc/main.c b/midiproc/main.c
index 11ec5eac..54940221 100644
--- a/midiproc/main.c
+++ b/midiproc/main.c
@@ -161,8 +161,9 @@ static boolean MidiPipe_RegisterSong(buffer_reader_t *reader)
     buffer[0] = (i >> 8) & 0xff;
     buffer[1] = i & 0xff;
 
+    DWORD bytes_written;
     WriteFile(midi_process_out, buffer, sizeof(buffer),
-        NULL, NULL);
+        &bytes_written, NULL);
 
     return true;
 }
diff --git a/src/i_midipipe.c b/src/i_midipipe.c
index 0d80ccfc..fd7fb2e8 100644
--- a/src/i_midipipe.c
+++ b/src/i_midipipe.c
@@ -127,8 +127,9 @@ static boolean UsingNativeMidi()
 //
 static boolean WritePipe(net_packet_t *packet)
 {
+    DWORD bytes_written;
     BOOL ok = WriteFile(midi_process_in_writer, packet->data, packet->len,
-        NULL, NULL);
+        &bytes_written, NULL);
 
     if (!ok)
     {