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
#include <stdarg.h>
+#if HAVE_STDINT_H
+#include <stdint.h>
+#endif
/* Nb: this file might be included in a file compiled with -ansi. So
we can't use C++ style "//" comments nor the "asm" keyword (instead