bugfix: Initialize uxTaskNumber at task initialization (#374)

* bugfix: Initialize uxTaskNumber at task initialization

.github/lexicon.txt

@@ -2452,6 +2452,7 @@ uxstreambuffernumber
 uxtaskgetnumberoftasks
 uxtaskgetstackhighwatermark
 uxtaskgetsystemstate
+uxtaskgettasknumber
 uxtasknumber
 uxtaskpriorityget
 uxtaskprioritygetfromisr
@@ -2601,6 +2602,7 @@ vtaskremovefromunorderedeventlist
 vtaskresume
 vtaskresumefromisr
 vtasksetapplicationtasktag
+vtasksettasknumber
 vtasksettimeout
 vtasksettimeoutstate
 vtaskstartscheduler

tasks.c

@@ -1122,6 +1122,10 @@ static void prvAddNewTaskToReadyList( TCB_t * pxNewTCB )
             {
                 /* Add a counter into the TCB for tracing only. */
                 pxNewTCB->uxTCBNumber = uxTaskNumber;
+
+                /* Initialize the uxTaskNumber member to zero. It is utilized by the
+                 * application using vTaskSetTaskNumber and uxTaskGetTaskNumber APIs. */
+                pxNewTCB->uxTaskNumber = 0;
             }
         #endif /* configUSE_TRACE_FACILITY */
         traceTASK_CREATE( pxNewTCB );