Added missing header

ltjax · ltjax · commit f9ccf74d6675 · 2020-04-16T21:01:23.000+02:00
diff --git a/externals/hidapi/hid_common.cpp b/externals/hidapi/hid_common.cpp
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 #include "hidapi.h"
 
 HID_API_NAMESPACE_BEGIN
