[win32] use fixed zoom for default system font

This commit addresses a regression that is caused by
DPIUtil#getDeviceZoom not properly initialized yet, when created the first
system font. Explicitly passing the target zoom to the Font prevent the
issue.

Author: akoch-yatta

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/internal/DefaultSWTFontRegistry.java

@@ -49,7 +49,7 @@ public Font getSystemFont(int zoom) {
 		}
 		if (hFont == 0) hFont = OS.GetStockObject (OS.DEFAULT_GUI_FONT);
 		if (hFont == 0) hFont = OS.GetStockObject (OS.SYSTEM_FONT);
-		Font font = Font.win32_new(device, hFont);
+		Font font = Font.win32_new(device, hFont, zoom);
 		registerFont(KEY_SYSTEM_FONTS, font);
 		registerFont(font.getFontData()[0], font);
 		return font;