Compiler doesn't like referencing unset variables

win/rfb_win32/DeviceContext.cxx

@@ -127,6 +127,10 @@ PixelFormat DeviceContext::getPF(HDC dc) {
     if (bpp < 8)
       bpp = 8;
     vlog.info("%d-colour palettised", 1<<depth);
+    // Aren't really used, but set them to keep the compiler happy
+    redMax = redShift = 0;
+    greenMax = greenShift = 0;
+    blueMax = blueShift = 0;
   }