bugfix: consistent use of 'int' for alpha values (#3187373)

WindowMenuAccessor returned strange alpha values if compiled
with 'g++ -Os'; unholy black magic happens if template<int> faces
functions returning only 'usigned char'.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/SystemTray.hh b/src/SystemTray.hh
index 153220c..3209790 100644
--- a/src/SystemTray.hh
+++ b/src/SystemTray.hh
@@ -74,7 +74,7 @@ public:
     int numClients() const { return m_clients.size(); }
     const FbTk::FbWindow &window() const { return m_window; }
 
-    void renderTheme(unsigned char alpha) { 
+    void renderTheme(int alpha) { 
         m_window.setBorderWidth(m_theme->border().width());
         m_window.setBorderColor(m_theme->border().color());
         m_window.setAlpha(alpha);