[win32] Prevent loop with fix swt.autoScale value

This commit adapts the extraction of the correct image handle in the
windows implementation when using an Image with a GC. As the image will
always pass the exact zoom it needs to the GC using the autoscaled zoom
together with an Image can lead to unexpected results when fixed values
for swt.autoScale are passed, e.g. scaling ImageData can result in
endless loops.

Author: akoch-yatta

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

@@ -3909,7 +3909,7 @@ void init(Drawable drawable, GCData data, long hDC) {
 	}
 	Image image = data.image;
 	if (image != null) {
-		data.hNullBitmap = OS.SelectObject(hDC, Image.win32_getHandle(image, DPIUtil.getZoomForAutoscaleProperty(data.nativeZoom)));
+		data.hNullBitmap = OS.SelectObject(hDC, Image.win32_getHandle(image, data.nativeZoom));
 		image.memGC = this;
 	}
 	int layout = data.layout;