app/test: fix uninitialized event in DMA adapter test

Zero-initialize the event structure in configure_event_dma_adapter()
to fix a clang build error with -Wuninitialized-const-pointer.

Fixes: a276e7c ("test/event: add DMA adapter auto-test")

Signed-off-by: Shani Peretz <shperetz@nvidia.com>
Acked-by: Kevin Traynor <ktraynor@redhat.com>

Author: Shani Peretz

app/test/test_event_dma_adapter.c

@@ -557,7 +557,7 @@ configure_event_dma_adapter(enum rte_event_dma_adapter_mode mode)
 {
 	struct rte_event_dev_info evdev_info = {0};
 	struct rte_event_port_conf conf = {0};
-	struct rte_event event;
+	struct rte_event event = {0};
 	uint32_t cap;
 	int ret;