Remove long/int types which are no longer present in g-i

We're using C++ now with a modern libtool/autoconf, so remove old hacks

Instead of reopening them on each access

We cannot reliably use symbols from a module after
we called dlclose() on them :-)

g++ warns if you send in a static string to a function
expecting a char* and not a const char*

 * gi/pygi-invoke.c: Wrap foreign structs returned by constructors
 * gi/pygi-foreign.c: Register foreign support for GVariant
 * gi/pygi-struct.c: properly release foreign structs
 * gi/pygi-argument.c, gi/pygi-foreign-cairo.c, gi/pygi.h: Adapt to API changes
 * tests/test_everything.py: Add basic tests for GVariant

https://bugzilla.gnome.org/show_bug.cgi?id=619501

Remove unused variables, make sure variables are properly initialized.

https://bugzilla.gnome.org/show_bug.cgi?id=624066

As of commit 5cb925b20, many type_tags for standard C types have
been removed - namely machine-dependent integer types and derived
types (size_t, time_t).

Most removals are just synonyms of other types, so their removal
should not have too much impact, with the exception of time_t,
which was translated to a native datetime object before.

Also remove time_t tests (Tomeu Vizoso).

https://bugzilla.gnome.org/show_bug.cgi?id=624065

* treeiter changes to reflect caller-allocate annotations
* fix some flag handling
* use get_indicies_with_depth instead of get_indices for paths

* we still don't pass tests because the caller-allocates code path does not
  handle the case where the parameter is followed by a regular in parameter

Fixes bug #623486.

This class was lately removed from gtk+ 3, so there is no need to override
it anymore.

Philip Withnall authored Jun 29, 2010 and Philip Withnall committed Jun 29, 2010

Closes: bgo#622882