missing initializations

'valgrind' reported a lot of code branches based upon uninitialized
variables. some are not identified yet.

src/IconbarTool.cc

@@ -268,7 +268,8 @@ IconbarTool::IconbarTool(const FbTk::FbWindow &parent, IconbarTheme &theme,
     m_rc_use_pixmap(screen.resourceManager(), true,
                     screen.name() + ".iconbar.usePixmap", screen.altName() + ".Iconbar.UsePixmap"),
     m_menu(screen.menuTheme(), screen.imageControl(),
-           *screen.layerManager().getLayer(Layer::MENU)) {
+           *screen.layerManager().getLayer(Layer::MENU)),
+    m_alpha(255) {
 
     // setup mode menu
     setupModeMenu(m_menu, *this);

src/Screen.cc

@@ -332,6 +332,7 @@ BScreen::BScreen(FbTk::ResourceManager &rm,
                  int scrn, int num_layers) :
     m_reconfigure_sig(*this), // reconfigure signal
     m_layermanager(num_layers),
+    m_image_control(0),
     m_focused_windowtheme(new FbWinFrameTheme(scrn, ".focus", ".Focus")),
     m_unfocused_windowtheme(new FbWinFrameTheme(scrn, ".unfocus", ".Unfocus")),
     // the order of windowtheme and winbutton theme is important

src/main.cc

@@ -183,6 +183,7 @@ static void showInfo(ostream &ostr) {
 }
 
 struct Options {
+    Options() : xsync(false) { }
     std::string session_display;
     std::string rc_file;
     std::string log_filename;