修正SpkUi初始化中的亮暗色更改判断逻辑错误

gui/spkui_general.cpp

@@ -54,6 +54,7 @@ namespace SpkUi
     StylesheetBase = ObtainStylesheet.readAll();
     ObtainStylesheet.close();
 
+    CurrentStyle = SpkUiStyle::Invalid;
     SetGlobalStyle(Light, false);
 
     // Initalize crash handler

inc/spkui_general.h

@@ -16,7 +16,7 @@
 namespace SpkUi
 {
 
-  enum SpkUiStyle { Light, Dark };
+  enum SpkUiStyle { Invalid, Light, Dark };
   enum SpkButtonStyle { Normal = 0, Recommend, Warn };
 
   class SpkPopup;