This ensures the uintptr_t type is defined on mingw-w64.
Fixes compile error:
make[4]: Entering directory
`/home/abuild/rpmbuild/BUILD/glib-2.42.0/gobject'
CC libgobject_2_0_la-gtype.lo
In file included from gtype.c:24:0:
../glib/valgrind.h: In function 'VALGRIND_PRINTF':
../glib/valgrind.h:5601:4: error: unknown type name 'uintptr_t'
uintptr_t _qzz_res;
^
https://bugzilla.gnome.org/show_bug.cgi?id=737143
...so that builds of GLib on x64 Visual C++ can be restored, as the build
fails in line 449 of valgrind.h as it only supports MinGW/GCC for x64
Windows and simply will not build otherwise. Make the x64 Visual C++
builds compile again by defining NVALGRIND when GLib is being built for
Windows on x64 Visual C++.
https://bugzilla.gnome.org/show_bug.cgi?id=732465
This is a BSD-licenced header file that is designed to be copy-pasted
into programs. It will allow us to detect if we are running under
Valgrind and send "client requests" to it.
We will use this for a couple of reasons in upcoming patches.
https://bugzilla.gnome.org/show_bug.cgi?id=698595
