Fix libtiff compilation with MinGW.

At least some versions of MinGW don't define 64 bit integer types resulting in
errors when they're used in libtiff code, so explicitly include basetyps.h to
make sure these types are defined.

Closes #14897.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73190 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/tiff/libtiff/tiffconf.h

@@ -7,6 +7,10 @@
 #ifndef _TIFFCONF_
 #define _TIFFCONF_
 
+#ifdef __MINGW32__
+#include <basetyps.h>
+#endif
+
 /* Define to 1 if the system has the type `int16'. */
 /* #undef HAVE_INT16 */