From f71f07b0ad4d178c0f25f59872bf22ec80790811 Mon Sep 17 00:00:00 2001
From: AZ Huang <aitjcize@gmail.com>
Date: Thu, 28 Nov 2013 03:31:10 +0800
Subject: [PATCH] Add extra check to opened file opointer.

---
 src/chat.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/chat.c b/src/chat.c
index 47a2205..ddc475d 100644
--- a/src/chat.c
+++ b/src/chat.c
@@ -205,6 +205,11 @@ static void chat_onFileData(ToxWindow *self, Tox *m, int num, uint8_t filenum, u
     uint8_t *filename = friends[num].file_receiver.filenames[filenum];
     FILE *file_to_save = fopen(filename, "a");
 
+     // we have a problem here, but don't let it segfault
+    if (file_to_save == NULL) {
+        return;
+    }
+
     if (fwrite(data, length, 1, file_to_save) != 1) {
         wattron(ctx->history, COLOR_PAIR(RED));
         wprintw(ctx->history, "* Error writing to file.\n");