Please describe the problem:
I think that the function Accessible_getHostApplication() (in the C binding) takes double references to the AccessibleApplication* that it returns. 
Thus, instead of calling AccessibleApplication_unref() twice on the resulting pointer, one has to call it twice. 

Steps to reproduce:
Run the simplest AT-SPI C program with this snippet:

Accessibility *a;
AccessibilityApplication *ap;

SPI_init();
...
/* assume 'a' has a valid pointer */
ap = Accessible_getHostApplication(a);
if (ap) {
  AccessibleApplication_unref(ap);
  /* AccessibleApplication_unref(ap); */
}
...
printf("ref counts: %d\n", SPI_exit());
...


Actual results:
the output is "1" where it should have been "0".
if the second unref is uncommented, the output becomes correct.

Expected results:


Does this happen every time?


Other information:
the obvious workaround in the program I'm developing is to do the unreference twice to match the excessive reference.