Made the pointer-ness of object handles explicit.

examples/boing.c

diff --git a/examples/boing.c b/examples/boing.c
index c544e7a..5f006a8 100644
--- a/examples/boing.c
+++ b/examples/boing.c
@@ -42,7 +42,7 @@
 /* Prototypes */
 void init( void );
 void display( void );
-void reshape( GLFWwindow window, int w, int h );
+void reshape( GLFWwindow* window, int w, int h );
 void DrawBoingBall( void );
 void BounceBall( double dt );
 void DrawBoingBallBand( GLfloat long_lo, GLfloat long_hi );
@@ -224,7 +224,7 @@
 /*****************************************************************************
  * reshape()
  *****************************************************************************/
-void reshape( GLFWwindow window, int w, int h )
+void reshape( GLFWwindow* window, int w, int h )
 {
    glViewport( 0, 0, (GLsizei)w, (GLsizei)h );
 
@@ -567,7 +567,7 @@
 
 int main( void )
 {
-   GLFWwindow window;
+   GLFWwindow* window;
    int width, height;
 
    /* Init GLFW */