Cleanup

Replaces tabs with spaces.  Makes code idiomatic.  Adds credit.

Closes #1043.

README.md

@@ -259,6 +259,7 @@ skills.
  - Martin Capitanio
  - David Carlier
  - Chi-kwan Chan
+ - Michał Cichoń
  - Lambert Clara
  - Andrew Corrigan
  - Noel Cower

src/win32_joystick.c

@@ -576,12 +576,10 @@ void _glfwDetectJoystickConnectionWin32(void)
 void _glfwDetectJoystickDisconnectionWin32(void)
 {
     int jid;
-    _GLFWjoystick* js;
 
     for (jid = 0;  jid <= GLFW_JOYSTICK_LAST;  jid++)
     {
-        js = &_glfw.joysticks[jid];
-
+        _GLFWjoystick* js = _glfw.joysticks + jid;
         if (js->present)
             _glfwPlatformPollJoystick(js, _GLFW_POLL_PRESENCE);
     }