FS#111 - Fixed joysticks sometimes not working at all on Vista

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/trunk@1090 4e206d99-4929-0410-ac5d-dfc041789085

src/SFML/Window/Win32/Joystick.cpp

@@ -49,6 +49,8 @@ void Joystick::Initialize(unsigned int Index)
     // Get the Index-th connected joystick
     MMRESULT Error;
     JOYINFOEX JoyInfo;
+    JoyInfo.dwSize = sizeof(JoyInfo);
+    JoyInfo.dwFlags = JOY_RETURNALL;
     for (unsigned int NbFound = 0; (Error = joyGetPosEx(myIndex, &JoyInfo)) != JOYERR_PARMS; myIndex++)
     {
         // Check if the current joystick is connected