[monitoring-plugins] Fix build issue with MariaDB 10.2

[GitHub]

    Module: monitoring-plugins
    Branch: master
    Commit: 399cc141526ee77e1befce469f1fab40645f299d
    Author: Bernard Spil <s...@users.noreply.github.com>
 Committer: GitHub <nore...@github.com>
      Date: Mon Nov  6 17:31:44 2017 +0100
       URL: 
https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=399cc14

Fix build issue with MariaDB 10.2

As of 10.2 MariaDB no longer defines MYSQL_PORT.

---

 plugins/common.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/plugins/common.h b/plugins/common.h
index 8719b50..6bf4fca 100644
--- a/plugins/common.h
+++ b/plugins/common.h
@@ -174,6 +174,11 @@
  *
  */
 
+/* MariaDB 10.2 client does not set MYSQL_PORT */
+#ifndef MYSQL_PORT
+#  define MYSQL_PORT 3306
+#endif
+
 enum {
        OK = 0,
        ERROR = -1