Bugfix/bsd compile warnings (#307)

* Fix FreeBSD compile warnings

* remove example app from ports/bsd. OS based apps are in apps folder

Co-authored-by: Steve Karg <skarg@users.sourceforge.net>

src/bacnet/basic/npdu/h_npdu.c

@@ -157,7 +157,6 @@ static void network_control_handler(BACNET_ADDRESS *src,
     uint16_t npdu_len)
 {
     uint16_t dnet = 0;
-    uint16_t len = 0;
     uint8_t status = 0;
 
     switch (npdu_data->network_message_type) {

src/bacnet/basic/object/color_object.c

@@ -465,7 +465,7 @@ bool Color_Default_Fade_Time_Set(uint32_t object_instance, uint32_t value)
  */
 BACNET_COLOR_TRANSITION Color_Transition(uint32_t object_instance)
 {
-    BACNET_COLOR_TRANSITION value = BACNET_COLOR_OPERATION_IN_PROGRESS_MAX;
+    BACNET_COLOR_TRANSITION value = BACNET_COLOR_TRANSITION_NONE;
     struct object_data *pObject;
 
     pObject = Keylist_Data(Object_List, object_instance);

src/bacnet/basic/object/color_temperature.c

@@ -641,7 +641,7 @@ bool Color_Temperature_Default_Step_Increment_Set(
  */
 BACNET_COLOR_TRANSITION Color_Temperature_Transition(uint32_t object_instance)
 {
-    BACNET_COLOR_TRANSITION value = BACNET_COLOR_OPERATION_IN_PROGRESS_MAX;
+    BACNET_COLOR_TRANSITION value = BACNET_COLOR_TRANSITION_NONE;
     struct object_data *pObject;
 
     pObject = Keylist_Data(Object_List, object_instance);

src/bacnet/basic/service/h_ccov.c

@@ -189,7 +189,7 @@ CCOV_ABORT:
     if (bytes_sent <= 0) {
         PRINTF("CCOV: Failed to send PDU (%s)!\n", strerror(errno));
     }
-    bytes_sent = bytes_sent;
+    (void)bytes_sent;
 
     return;
 }