Follow coding standard for project.

src/drawing/engines/SoftwareDrawingEngine.cpp

@@ -365,7 +365,7 @@ public:
             _rainDrawer.SetDPI(&_bitsDPI);
             _rainDrawer.Restore();
 
-			ResetWindowVisbilities();
+            ResetWindowVisbilities();
 
             // Redraw dirty regions before updating the viewports, otherwise
             // when viewports get panned, they copy dirty pixels

src/interface/window.h

@@ -497,9 +497,9 @@ enum {
 
 enum VISIBILITY_CACHE
 {
-	VC_UNKNOWN = 0,
-	VC_VISIBLE = 1,
-	VC_COVERED = 2
+	VC_UNKNOWN,
+	VC_VISIBLE,
+	VC_COVERED
 };
 
 typedef void (*modal_callback)(int result);