EXPORT_FUNC, BASE_DEF and BASE_FUNC macros to
let them take an argument..
This is needed to compile the library as a DLL on some platforms
that have different compiler conventions..
support for multiple X11R6 entries in $(PATH) added.
ftxbbox.c, ftcalc.c, ftdebug.c, ftdriver.h:
doc fixes.
ftdebug.c:
formatting.
ftdebug.h:
making makros `;'-safe (i.e., they can now be used within if-else clauses
without side effects resp. don't produce a single `;').