Fix wrong cursor size when ImageData is unavailable at zoom

Previously, the cursor used DPIUtil.validateAndGetImageDataAtZoom() to
retrieve image data, which may return Imagedata at a different zoom
level than requested if ImageData for the exact zoom is unavailable.
This led to incorrect scaling when the returned image data was treated
as if it matched the requested zoom.

This commit replaces that logic with a temporary Image and calling
Image.getImageData(zoom) to  retrieve  image data for the requested zoom
level.

Author: arunjose696

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Cursor.java

@@ -421,7 +421,9 @@ public static Long win32_getHandle (Cursor cursor, int zoom) {
 	} else {
 		ImageData source;
 		if (cursor.imageDataProvider != null) {
-			source = DPIUtil.validateAndGetImageDataAtZoom(cursor.imageDataProvider, zoom).element();
+			Image tempImage = new Image(cursor.getDevice(), cursor.imageDataProvider);
+			source = tempImage.getImageData(zoom);
+			tempImage.dispose();
 		}
 		else {
 			source = DPIUtil.scaleImageData(cursor.device, cursor.source, zoom, DEFAULT_ZOOM);