Make sure sys/socket.h is explicitly included if HAVE_SYS_SOCKET_H is defined

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@389 f882894a-f735-0410-b71e-b25c423dba1c

plugins/common.h.in

@@ -62,6 +62,10 @@
 #include <sys/types.h>
 #endif
 
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
 #ifdef HAVE_SIGNAL_H
 #include <signal.h>
 #endif