Dont put the handles created at fixed size to zoomLevelToImageHandle

The image handles created for a given target height and width is created
by passing a zoom of -1. It does not make sense to put this handle in zoomLevelToImageHandle
map. Putting the handle in the map would result in the image handle to
be destroyed when switching monitors.

Author: arunjose696

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

@@ -1636,8 +1636,8 @@ else if (i.alphaData != null) {
 	}
 }
 
-private void setImageMetadataForHandle(ImageHandle imageMetadata, Integer zoom) {
-	if (zoom == null)
+private void setImageMetadataForHandle(ImageHandle imageMetadata, int zoom) {
+	if (zoom == -1)
 		return;
 	if (zoomLevelToImageHandle.containsKey(zoom)) {
 		SWT.error(SWT.ERROR_ITEM_NOT_ADDED);