Provide an xcb_free() function for use on Windows
On Windows, memory must generally be freed by the same DLL it was allocated in, as different DLLs may use different heaps. xcb_free() can be a trivial wrapper around free().
On Windows, memory must generally be freed by the same DLL it was allocated in, as different DLLs may use different heaps. xcb_free() can be a trivial wrapper around free().