From 7d2ef0ac3d583a2fe4eb2c0f0033395618c532af Mon Sep 17 00:00:00 2001
From: Lars Kellogg-Stedman <lars@redhat.com>
Date: Thu, 15 May 2014 21:02:31 -0400
Subject: [PATCH] prevent segfault caused by bitidx++

This patch modifies Adafruit_DHT_Driver/Adafruit_DHT.c so that the code
that increments `bitidx` without bound is protected by #ifdef DEBUG.
This prevents this code from generating a segfault if readDHT is called several
times (which will ultimately cause bitidx to increment beyond the end of the
bits array).

Resolves github issue #78.
---
 Adafruit_DHT_Driver/Adafruit_DHT.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Adafruit_DHT_Driver/Adafruit_DHT.c b/Adafruit_DHT_Driver/Adafruit_DHT.c
index 9d1746be..a35cf10d 100644
--- a/Adafruit_DHT_Driver/Adafruit_DHT.c
+++ b/Adafruit_DHT_Driver/Adafruit_DHT.c
@@ -105,7 +105,9 @@ int readDHT(int type, int pin) {
     }
     laststate = bcm2835_gpio_lev(pin);
     if (counter == 1000) break;
+#ifdef DEBUG
     bits[bitidx++] = counter;
+#endif
 
     if ((i>3) && (i%2 == 0)) {
       // shove each bit into the storage bytes