vulkaninfo: Fix missing struct declaration (warning)

diff --git a/vulkaninfo/vulkaninfo.c b/vulkaninfo/vulkaninfo.c
index 083155c..3037192 100644 (file)
--- a/vulkaninfo/vulkaninfo.c
+++ b/vulkaninfo/vulkaninfo.c
@@ -112,6 +112,8 @@ struct LayerExtensionList {
     VkExtensionProperties *extension_properties;
 };
 
+struct AppInstance;
+
 struct SurfaceExtensionNode {
     struct SurfaceExtensionNode *next;