[PATCH] xmm: include string.h for strlen()

[Ben Chan]

This patch fixes the following compiler warning:

xmm/mm-modem-helpers-xmm.c:388:38: error: implicitly declaring library function 'strlen' with type 'unsigned long (const char *)' [-Werror,-Wimplicit-function-declaration]
    g_regex_match_full (r, response, strlen (response), 0, 0, &match_info, &inner_error);
                                     ^
---
 plugins/xmm/mm-modem-helpers-xmm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/xmm/mm-modem-helpers-xmm.c b/plugins/xmm/mm-modem-helpers-xmm.c
index a8ede4cf..1c2280af 100644
--- a/plugins/xmm/mm-modem-helpers-xmm.c
+++ b/plugins/xmm/mm-modem-helpers-xmm.c
@@ -13,6 +13,8 @@
  * Copyright (C) 2018 Aleksander Morgado <aleksander at aleksander.es>
  */
 
+#include <string.h>
+
 #include "mm-log.h"
 #include "mm-modem-helpers.h"
 #include "mm-modem-helpers-xmm.h"
-- 
2.18.0.1017.ga543ac7ca45-goog