QSysTray: fix build for x64 arch
QSysTray: fix build for x64 arch

koletzky/haikuports,miqlas/haikuports,haikuports/haikuports,Begasus/haikuports,Begasus/haikuports,haikuports/haikuports,nielx/haikuports,haikuports/haikuports,Begasus/haikuports,miqlas/haikuports,Begasus/haikuports,koletzky/haikuports,moochris/haikuports,moochris/haikuports,moochris/haikuports,Begasus/haikuports,nielx/haikuports,haikuports/haikuports,koletzky/haikuports,nielx/haikuports,miqlas/haikuports,haikuports/haikuports