[win32] Init nativeZoom for taskbar

This commit initializes the nativeZoom attribute of the taskbar. As TaskBar is not calling a super constructor setting this attribute will be zero and can lead to issues with Images created with a zero zoom factor.

contributes to #1742

Author: akoch-yatta

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/TaskBar.java

@@ -65,6 +65,7 @@ public class TaskBar extends Widget {
 
 TaskBar (Display display, int style) {
 	this.display = display;
+	this.nativeZoom = display.getDeviceZoom();
 	createHandle ();
 	reskinWidget ();
 }