example: really resolve swapchain memory leak this time

examples/swapchain.zig

@@ -101,6 +101,7 @@ pub const Swapchain = struct {
 
     fn deinitExceptSwapchain(self: Swapchain) void {
         for (self.swap_images) |si| si.deinit(self.gc);
+        self.allocator.free(self.swap_images);
         self.gc.vkd.destroySemaphore(self.gc.dev, self.next_image_acquired, null);
     }
 
@@ -110,7 +111,6 @@ pub const Swapchain = struct {
 
     pub fn deinit(self: Swapchain) void {
         self.deinitExceptSwapchain();
-        self.allocator.free(self.swap_images);
         self.gc.vkd.destroySwapchainKHR(self.gc.dev, self.handle, null);
     }
 

examples/triangle.zig

@@ -56,7 +56,9 @@ pub fn main() !void {
     ) orelse return error.WindowInitFailed;
     defer c.glfwDestroyWindow(window);
 
-    const allocator = std.heap.page_allocator;
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    const allocator = gpa.allocator();
 
     const gc = try GraphicsContext.init(allocator, app_name, window);
     defer gc.deinit();