--- mqtt/configure	2013/01/18 09:45:34	1.3.2.1
+++ mqtt/configure	2017/10/08 22:49:24	1.4
@@ -2181,6 +2181,9 @@ ac_config_headers="$ac_config_headers inc/config.h"
 
 
 
+ac_cv_func_malloc_0_nonnull="yes"
+ac_cv_func_realloc_0_nonnull="yes"
+
 # Checks for programs.
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'