Attempt to fix win32 compilation after own recent commits.

source/blender/blenlib/intern/task.c

@@ -347,6 +347,7 @@ static TaskPool *task_pool_create_ex(TaskScheduler *scheduler, void *userdata, c
 	TaskPool *pool = MEM_callocN(sizeof(TaskPool), "TaskPool");
 
 #ifndef NDEBUG
+#  ifndef WIN32  /* WIN32 pthread_t seems to ba a struct, no direct comparison available, *sigh* */
 	/* Assert we do not try to create a background pool from some parent task - those only work OK from main thread. */
 	if (is_background) {
 		const pthread_t thread_id = pthread_self();
@@ -356,6 +357,7 @@ static TaskPool *task_pool_create_ex(TaskScheduler *scheduler, void *userdata, c
 			BLI_assert(scheduler->threads[i] != thread_id);
 		}
 	}
+#  endif
 #endif
 
 	pool->scheduler = scheduler;