fix unused parameter errors

src/rc_client.c

@@ -142,6 +142,8 @@ static void rc_client_natvis_helper(const rc_client_event_t* event, rc_client_t*
   } natvis;
 
   memset(&natvis, 0, sizeof(natvis));
+  (void)event;
+  (void)client;
 
   /* this code should never be executed. it just ensures these constants get defined for
    * the natvis VisualStudio extension as they're not used directly in the code. */

src/rcheevos/runtime.c

@@ -14,24 +14,28 @@
 typedef struct __rc_runtime_trigger_list_t { rc_runtime_t runtime; } __rc_runtime_trigger_list_t;
 typedef struct __rc_runtime_lboard_list_t { rc_runtime_t runtime; } __rc_runtime_lboard_list_t;
 
-static void rc_runtime_natvis_helper(void)
+static void rc_runtime_natvis_helper(const rc_runtime_event_t* runtime_event)
 {
   struct natvis_extensions {
     __rc_runtime_trigger_list_t trigger_list;
     __rc_runtime_lboard_list_t lboard_list;
   } natvis;
 
   memset(&natvis, 0, sizeof(natvis));
+  (void)runtime_event;
 
   natvis.lboard_list.runtime.lboard_count = 0;
 }
 
 /* ============================= */
 
 rc_runtime_t* rc_runtime_alloc(void) {
+  rc_runtime_t* self;
+
   /* create a reference to rc_runtime_natvis_helper so the extensions get compiled in. */
-  rc_runtime_t* self = (rc_runtime_t*)&rc_runtime_natvis_helper;
-  /* immediately replace the reference with an actual object. */
+  rc_runtime_event_handler_t unused = &rc_runtime_natvis_helper;
+  (void)unused;
+
   self = malloc(sizeof(rc_runtime_t));
 
   if (self) {