Update engine plugin version

This is tracking the latest version of Warhammer 40,000 Darktide.
Other games will likely need a different version.

src/plugin_api.h

@@ -1,5 +1,5 @@
 #pragma once
-// This is manually updated and minified PluginApi based on the publicly
+// This is a manually updated and minified PluginApi based on the publicly
 // available sources at: https://github.com/AutodeskGames/stingray-plugin
 // From
 // https://github.com/thewhitegoatcb/rawray/blob/master/rawray/PluginApi128.h
@@ -59,7 +59,7 @@ enum PluginApiID {
   CAMERA_API_ID = 38,
   END_OF_ENGINE_RESERVED_RANGE = 65535,
 
-  /* API IDs in the range 0--65535 are reserved by the engine. If you want to
+  /* API IDs in the range 0-65535 are reserved by the engine. If you want to
      provide your own API in your plugin, we suggest using a hash of the API's
      name as ID. */
 };
@@ -69,7 +69,7 @@ typedef void *(*GetApiFunction)(unsigned api);
 
 struct PluginApi {
 #ifdef __cplusplus
-  uint32_t version = 65;
+  uint32_t version = 69;
   uint32_t flags = 3; // lua plugin
 #else
   uint32_t version;

src/stingray_sdk.rs

@@ -19,11 +19,16 @@ pub use bindings::GetApiFunction;
 pub use bindings::PluginApi;
 pub use bindings::PluginApiID;
 
+// The API version. This must match with the game you're building the plugin for.
+const STINGRAY_PLUGIN_VERSION: u32 = 69;
+// A set of bitflags. The value `3` is known to work for Lua plugins.
+const STINGRAY_PLUGIN_FLAGS: u32 = 3;
+
 impl std::default::Default for PluginApi {
     fn default() -> Self {
         Self {
-            version: 65,
-            flags: 3,
+            version: STINGRAY_PLUGIN_VERSION,
+            flags: STINGRAY_PLUGIN_FLAGS,
             setup_game: None,
             update_game: None,
             shutdown_game: None,
@@ -53,11 +58,12 @@ fn get_engine_api(f: GetApiFunction, id: PluginApiID) -> *mut c_void {
 
 #[cfg(not(debug_assertions))]
 fn get_engine_api(f: GetApiFunction, id: PluginApiID) -> *mut c_void {
+    unsafe {
         // `Option::unwrap` still generates several instructions in
         // optimized code.
-    let f = unsafe { f.unwrap_unchecked() };
-
-    unsafe { f(id as u32) }
+        let f = f.unwrap_unchecked();
+        f(id as u32)
+    }
 }
 
 pub struct LoggingApi {