Add some checks

Using [infer](https://github.com/facebook/infer/blob/master/README.md), a number of silent issues have been detected, such as not checking some calls to `malloc` to  ensure the response is not NULL. Most of these have been addressed by additional checks.

diff --git a/configure.ac b/configure.ac
index 54670c95278ba4e0c4a5d00a2fe9ddf1e3ab2d63..3c4fb4f8ae65065a2a0b78dcde0c571a31e999f1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.50])
-AC_INIT([shairport-sync], [3.2d4], [mikebrady@eircom.net])
+AC_INIT([shairport-sync], [3.2d5], [mikebrady@eircom.net])
 AM_INIT_AUTOMAKE
 AC_CONFIG_SRCDIR([shairport.c])
 AC_CONFIG_HEADERS([config.h])