Fix crash in tests (remove unnecessary unknownWindows)

samples/SkijaInjectSample/src/main/kotlin/SkijaInjectSample/App.kt

@@ -25,7 +25,7 @@ fun createWindow(title: String) = SwingUtilities.invokeLater {
     var mouseY = 0
 
     val window = SkiaWindow()
-    window.defaultCloseOperation = WindowConstants.EXIT_ON_CLOSE
+    window.defaultCloseOperation = WindowConstants.DISPOSE_ON_CLOSE
     window.title = title
 
     // Create menu.

samples/SkijaInjectSample/src/main/kotlin/SkijaInjectSample/PureSwing.kt

+package SkijaInjectSample
+
+import java.awt.BorderLayout
+import javax.swing.JFrame
+import javax.swing.WindowConstants
+
+fun pureSwing() {
+    val window = JFrame()
+    window.defaultCloseOperation = WindowConstants.DISPOSE_ON_CLOSE
+    window.setSize(800, 600)
+
+    window.contentPane.add(Button("Skiko").apply {
+        addActionListener {
+            createWindow("Skiko")
+        }
+    }, BorderLayout.NORTH)
+    window.contentPane.add(Button("Swing").apply {
+        addActionListener {
+            pureSwing()
+        }
+    }, BorderLayout.WEST)
+    window.contentPane.add(Button("Swing+Skiko").apply {
+        addActionListener {
+            SwingSkia()
+        }
+    }, BorderLayout.EAST)
+    window.setVisible(true)
+}
\ No newline at end of file

samples/SkijaInjectSample/src/main/kotlin/SkijaInjectSample/SwingSkia.kt

@@ -19,7 +19,7 @@ fun Button(text: String): JButton {
 fun SwingSkia() = SwingUtilities.invokeLater {
 
     val window = JFrame()
-    window.defaultCloseOperation = WindowConstants.EXIT_ON_CLOSE
+    window.defaultCloseOperation = WindowConstants.DISPOSE_ON_CLOSE
     window.title = "SwingSkiaWindow"
 
     val panel = SkiaPanel()

skiko/src/jvmMain/objectiveC/macos/drawlayer.m

@@ -61,8 +61,6 @@
 
 @end
 
-NSMutableArray *unknownWindows = nil;
-
 NSMutableSet *layerStorage = nil;
 
 LayerHandler * findByObject(JNIEnv *env, jobject object)
@@ -120,33 +118,21 @@ JNIEXPORT void JNICALL Java_org_jetbrains_skiko_HardwareLayer_init(JNIEnv *env,
         jobject canvasGlobalRef = (*env)->NewGlobalRef(env, canvas);
         [layersSet setCanvasGlobalRef: canvasGlobalRef];
 
-        if (unknownWindows == nil)
-        {
-            NSMutableArray<NSWindow *> *windows = [NSMutableArray arrayWithArray: [[NSApplication sharedApplication] windows]];
-            layersSet.window = [windows lastObject];
-            [windows removeObject: layersSet.window];
-            unknownWindows = windows;
-        }
-        else
+        NSMutableArray<NSWindow *> *windows = [NSMutableArray arrayWithArray: [[NSApplication sharedApplication] windows]];
+
+        for (LayerHandler* value in layerStorage)
         {
-            NSMutableArray<NSWindow *> *windows = [NSMutableArray arrayWithArray: [[NSApplication sharedApplication] windows]];
-            for (NSWindow* value in unknownWindows)
-            {
-                [windows removeObject: value];
-            }
-            for (LayerHandler* value in layerStorage)
+            if (layersSet.container == value.container)
             {
-                if (layersSet.container == value.container)
-                {
-                    layersSet.window = value.window;
-                }
-            }
-            if (layersSet.window == NULL)
-            {
-                layersSet.window = [windows lastObject];
+                layersSet.window = value.window;
             }
         }
 
+        if (layersSet.window == NULL)
+        {
+            layersSet.window = [windows lastObject];
+        }
+
         [layerStorage addObject: layersSet];
     }