[180] Fix #includes in lib/send_mosq.c

Ensures that LWS_LIBRARY_VERSION_NUMBER is always present in all source
files when it is defined.

Thanks to dennisip86.

Bug: https://github.com/eclipse/mosquitto/issues/180

ChangeLog.txt

@@ -21,6 +21,8 @@ Broker:
 - mosquitto_passwd utility now correctly deals with unknown command line
   arguments in all cases. Closes #169.
 - Fix publishing of $SYS/broker/clients/maximum
+- Fix order of #includes in lib/send_mosq.c to ensure struct mosquitto doesn't
+  differ between source files when websockets is being used. Closes #180.
 
 Client library:
 - Fix the case where a message received just before the keepalive timer

lib/send_mosq.c

@@ -18,6 +18,13 @@ Contributors:
 #include <stdio.h>
 #include <string.h>
 
+#ifdef WITH_BROKER
+#include <mosquitto_broker.h>
+#  ifdef WITH_SYS_TREE
+extern uint64_t g_pub_bytes_sent;
+#  endif
+#endif
+
 #include <mosquitto.h>
 #include <mosquitto_internal.h>
 #include <logging_mosq.h>
@@ -28,13 +35,6 @@ Contributors:
 #include <time_mosq.h>
 #include <util_mosq.h>
 
-#ifdef WITH_BROKER
-#include <mosquitto_broker.h>
-#  ifdef WITH_SYS_TREE
-extern uint64_t g_pub_bytes_sent;
-#  endif
-#endif
-
 int _mosquitto_send_pingreq(struct mosquitto *mosq)
 {
 	int rc;