Poll diagnostic mesh tail after the original loop stops

tests/test_radio_mesh.c

@@ -160,7 +160,7 @@ static void mesh_snapshot(struct mesh_ctx* t, const char* reason) {
     }
 }
 
-static void mesh_tail_stop(void* arg) { uasync_stop(arg); }
+static void mesh_tail_stop(void* arg) { *(int*)arg = 1; }
 
 static int G_PASSED = 0, G_FAILED = 0, G_TOTAL = 0;
 #define TEST(n)  do { G_TOTAL++; printf("  %-58s", n); fflush(stdout); } while(0)
@@ -536,9 +536,10 @@ int main(int argc, char** argv) {
         /* Диагностический хвост не меняет сохранённый результат исходной проверки. */
         if (getenv("UTUN_TEST_MESH_TAIL")) {
             DEBUG_INFO(DEBUG_CATEGORY_DEBUG, "mesh observe tail=500ms original_ok=%d original_dupC=%u", ok, dup_c);
-            void* tail = uasync_set_timeout(ua, 5000, ua, mesh_tail_stop, "mesh_diagnostic_tail");
+            int finished = 0;
+            void* tail = uasync_set_timeout(ua, 5000, &finished, mesh_tail_stop, "mesh_diagnostic_tail");
             if (!tail) { DEBUG_ERROR(DEBUG_CATEGORY_DEBUG, "mesh: tail timer allocation failed"); abort(); }
-            uasync_mainloop(ua);
+            while (!finished) uasync_poll(ua, 100);
             mesh_snapshot(&t, "after_diagnostic_tail");
         }