vulkan/wsi: initialise image_index to 0 in x11_manage_fifo_queues

Supresses a maybe-uninitialized warning with GCC 8.

Note: image_index should always be initialised due to the result check,
      but the compiler doesn't see that.

Signed-off-by: Kai Wasserbäch <kai@dev.carbon-project.org>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/vulkan/wsi/wsi_common_x11.c b/src/vulkan/wsi/wsi_common_x11.c
index 7e7b3a94e4bb04bac6130fa83a81836150ccf683..7b930884b4709d7c6dc4211a85ff249855ff797f 100644 (file)
--- a/src/vulkan/wsi/wsi_common_x11.c
+++ b/src/vulkan/wsi/wsi_common_x11.c
@@ -991,7 +991,7 @@ x11_manage_fifo_queues(void *state)
        * before that point so the client should be able to acquire any image
        * other than the currently presented one.
        */
-      uint32_t image_index;
+      uint32_t image_index = 0;
       result = wsi_queue_pull(&chain->present_queue, &image_index, INT64_MAX);
       assert(result != VK_TIMEOUT);
       if (result < 0) {