[PATCH] Fix compilation with musl libc

* libmailutils/sockaddr/str.c: Include stdlib.h for NULL
---
 libmailutils/sockaddr/str.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libmailutils/sockaddr/str.c b/libmailutils/sockaddr/str.c
index e5bd5a1..6de2647 100644
--- a/libmailutils/sockaddr/str.c
+++ b/libmailutils/sockaddr/str.c
@@ -25,6 +25,7 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>
+#include <stdlib.h>
 
 #include <mailutils/sockaddr.h>
 #include <mailutils/errno.h>
-- 
2.10.2