Fix blurry shell icon #62

Windows only: use the original width and height of the images set to the
shell when searching for the best fit instead of adapting them to the
zoom, otherwise the smallest image will always be picked and it will
result in a blurry shell icon when scaling up for monitors with a higher
zoom levels.

contributes to
#62 and
#127

Author: fedejeanne

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

@@ -899,7 +899,7 @@ void setImages (Image image, Image [] images) {
 				System.arraycopy (images, 0, bestImages, 0, images.length);
 				datas = new ImageData [images.length];
 				for (int i=0; i<datas.length; i++) {
-					datas [i] = images [i].getImageData (getZoom());
+					datas [i] = images [i].getImageData ();
 				}
 				images = bestImages;
 				sort (images, datas, getSystemMetrics (OS.SM_CXSMICON), getSystemMetrics (OS.SM_CYSMICON), depth);