Make sure that Mouse.destroy ungrabs the cursor

src/java/org/lwjgl/input/Mouse.java

@@ -296,7 +296,7 @@ public class Mouse {
 		created = false;
 		buttons = null;
 		coord_buffer = null;
-
+		
 		implementation.destroyMouse();
 	}
 

src/java/org/lwjgl/opengl/AbstractAWTInput.java

@@ -84,10 +84,6 @@ abstract class AbstractAWTInput implements AWTCanvasInputImplementation {
 	public synchronized void destroy() {
 		canvas.setInput(null);
 		canvas = null;
-		if (mouse_queue != null)
-			mouse_queue.unregister();
-		if (keyboard_queue != null)
-			keyboard_queue.unregister();
 	}
 
 	public final int getWidth() {
@@ -115,8 +111,11 @@ abstract class AbstractAWTInput implements AWTCanvasInputImplementation {
 		return new MouseEventQueue(getCanvas());
 	}
 
-	public void destroyMouse() {
-		mouse_queue.unregister();
+	public synchronized void destroyMouse() {
+		if (mouse_queue != null) {
+			mouse_queue.unregister();
+			mouse_queue = null;
+		}
 	}
 
 	public int getNativeCursorCapabilities() {
@@ -145,8 +144,10 @@ abstract class AbstractAWTInput implements AWTCanvasInputImplementation {
 	}
 
 	public synchronized void destroyKeyboard() {
-		if (keyboard_queue != null)
+		if (keyboard_queue != null) {
 			keyboard_queue.unregister();
+			keyboard_queue = null;
+		}
 	}
 
 	public Object createCursor(int width, int height, int xHotspot, int yHotspot, int numImages, IntBuffer images, IntBuffer delays) throws LWJGLException {

src/java/org/lwjgl/opengl/LinuxAWTInput.java

@@ -137,6 +137,11 @@ final class LinuxAWTInput extends AbstractAWTInput {
 			LinuxDisplay.unlockAWT();
 		}
 	}
+	
+	public void destroyMouse() {
+		ungrabInputLocked();
+		super.destroyMouse();
+	}
 
 	private void checkFocus() {
 		if (getCanvas().isFocusOwner()) {
@@ -148,7 +153,7 @@ final class LinuxAWTInput extends AbstractAWTInput {
 	}
 
 	private boolean shouldGrab() {
-		return !input_released && isGrabbed();
+		return !input_released && isGrabbed() && getMouseEventQueue() != null;
 	}
 
 	private void update() {

src/java/org/lwjgl/opengl/LinuxDisplay.java

@@ -348,7 +348,7 @@ final class LinuxDisplay implements DisplayImplementation {
 	}
 
 	private boolean shouldGrab() {
-		return !input_released && grab;
+		return !input_released && grab && mouse != null;
 	}
 
 	private void updatePointerGrab() {
@@ -715,6 +715,7 @@ final class LinuxDisplay implements DisplayImplementation {
 
 	public void destroyMouse() {
 		mouse = null;
+		updateInputGrab();
 	}
 	
 	public void pollMouse(IntBuffer coord_buffer, ByteBuffer buttons) {

src/java/org/lwjgl/opengl/LinuxMouse.java

@@ -194,7 +194,7 @@ final class LinuxMouse {
 	private static native void nWarpCursor(long display, long window, int x, int y);
 
 	private void handlePointerMotion(boolean grab, boolean warp_pointer, long millis, long root_window, int x_root, int y_root, int x, int y) {
-	    doHandlePointerMotion(grab, warp_pointer, root_window, x_root, y_root, x, y, millis*1000000);
+		doHandlePointerMotion(grab, warp_pointer, root_window, x_root, y_root, x, y, millis*1000000);
 	}
 	
 	private void handleButton(boolean grab, int button, byte state, long nanos) {
@@ -256,7 +256,7 @@ final class LinuxMouse {
 		}
 	}
 	
-	private  void resetCursor(int x, int y) {
+	private void resetCursor(int x, int y) {
 		last_x = x;
 		last_y = transformY(y);
 	}

src/java/org/lwjgl/opengl/MacOSXAWTInput.java

@@ -60,4 +60,10 @@ final class MacOSXAWTInput extends AbstractAWTInput {
 			((MacOSXMouseEventQueue)getMouseEventQueue()).warpCursor();
 		had_focus = has_focus;
 	}
+	
+	public synchronized void destroyMouse() {
+		if (getMouseEventQueue() != null)
+			getMouseEventQueue().setGrabbed(false);
+		super.destroyMouse();
+	}
 }

src/java/org/lwjgl/opengl/MacOSXDisplay.java

@@ -299,8 +299,10 @@ final class MacOSXDisplay implements DisplayImplementation {
 	}
 
 	public void destroyMouse() {
-		if (mouse_queue != null)
+		if (mouse_queue != null) {
+			mouse_queue.setGrabbed(false);
 			mouse_queue.unregister();
+		}
 		this.mouse_queue = null;
 	}
 

src/java/org/lwjgl/opengl/WindowsAWTInput.java

@@ -64,12 +64,12 @@ final class WindowsAWTInput extends AbstractAWTInput {
 		blank_cursor = AWTUtil.createCursor(w, h, 0, 0, 1, BufferUtils.createIntBuffer(w*h), null);
 	}
 
-	public synchronized void destroy() {
-		super.destroy();
+	public synchronized void destroyMouse() {
 		if (cached_mouse != null) {
 			grab(false);
 			cached_mouse.destroy();
 		}
+		super.destroyMouse();
 	}
 
 	public synchronized void processInput(PeerInfo peer_info) {