Avoid compilation warning

src/ColorScheme.h

@@ -209,7 +209,7 @@ private:
 
     QString _description;
     QString _name;
-    qreal _opacity;
+
     ColorEntry* _table; // pointer to custom color table or 0 if the default
     // color scheme is being used
 
@@ -219,6 +219,8 @@ private:
     // if no colors in the color scheme support
     // randomization
 
+    qreal _opacity;
+
     ColorSchemeWallpaper::Ptr _wallpaper;
 
     static const char* const colorNames[TABLE_COLORS];