Calibre style: Fix various compiler warnings on non X11 platforms

src/qtcurve/style/blurhelper.cpp

@@ -209,6 +209,9 @@ namespace QtCurve
         // force update
         if( widget->isVisible() )
         { widget->update(); }
+        
+        #else
+        Q_UNUSED(widget);
 
         #endif
 
@@ -220,6 +223,8 @@ namespace QtCurve
     {
         #ifdef Q_WS_X11
         XChangeProperty( QX11Info::display(), widget->winId(), _atom, XA_CARDINAL, 32, PropModeReplace, 0, 0 );
+        #else
+        Q_UNUSED(widget);
         #endif
 
     }

src/qtcurve/style/qtcurve.cpp

@@ -731,6 +731,7 @@ inline int numButtons(EScrollbar type)
         case SCROLLBAR_NONE:
             return 0;
     }
+    return 2;
 }
 
 static inline void drawRect(QPainter *p, const QRect &r)
@@ -963,7 +964,7 @@ Style::Style()
         itsAnimateStep(0),
         itsTitlebarHeight(0),
         calibre_icon_map(QHash<int,QString>()),
-        is_kde_session(False),
+        is_kde_session(0),
         itsPos(-1, -1),
         itsHoverWidget(0L),
 #ifdef Q_WS_X11
@@ -978,7 +979,9 @@ Style::Style()
         , itsName(name)
 #endif
 {
+#if !defined(_WIN32) && !defined(__APPLE__)
     is_kde_session = (getenv("KDE_FULL_SESSION") != NULL);
+#endif
     const char *env=getenv(QTCURVE_PREVIEW_CONFIG);
     if(env && 0==strcmp(env, QTCURVE_PREVIEW_CONFIG))
     {

src/qtcurve/style/utils.cpp

@@ -74,6 +74,7 @@ namespace QtCurve
             else
                 return false;
             #else
+            Q_UNUSED(widget);
             return compositingActive();
             #endif
         }

src/qtcurve/style/windowmanager.cpp

@@ -680,6 +680,8 @@ namespace QtCurve
             NETRootInfo rootInfo(QX11Info::display(), NET::WMMoveResize);
             rootInfo.moveResizeRequest( widget->window()->winId(), position.x(), position.y(), NET::Move);
             #endif // QTC_QT_ONLY
+            #else
+            Q_UNUSED(position);
             #endif
 
         }