event_create(): check malloc() return value to be non-NULL (#1084)

* event_create(): check malloc() to be non-NULL

Check malloc() to return non-NULL before writing data
in the function event_create().

Signed-off-by: Florian La Roche <Florian.LaRoche@gmail.com>

* Code review suggestion

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>

---------

Signed-off-by: Florian La Roche <Florian.LaRoche@gmail.com>
Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
Co-authored-by: Gaurav-Aggarwal-AWS <33462878+aggarg@users.noreply.github.com>
Co-authored-by: Gaurav Aggarwal <aggarg@amazon.com>

portable/ThirdParty/GCC/Posix/utils/wait_for_event.c

@@ -43,9 +43,13 @@ struct event * event_create( void )
 {
     struct event * ev = malloc( sizeof( struct event ) );
 
-    ev->event_triggered = false;
-    pthread_mutex_init( &ev->mutex, NULL );
-    pthread_cond_init( &ev->cond, NULL );
+    if( ev != NULL )
+    {
+        ev->event_triggered = false;
+        pthread_mutex_init( &ev->mutex, NULL );
+        pthread_cond_init( &ev->cond, NULL );
+    }
+
     return ev;
 }