sys/windows/Makefile.mingw32 and sys/windows/Makefile.mingw32.depend
(pr #661 by feiyunw)
mark various pointers to const char as const pointers (pr #624 by argrath)
+function fill_special_room() in sp_lev.c was dereferencing a pointer
+ argument prior to a subsequent check for a NULL pointer that
+ resulted in an early function return (pr #669 by argrath)
+function repairable_damage() in shk.c was dereferencing a pointer
+ argument prior to a subsequent check for a NULL pointer that
+ resulted in an early function return (pr #671 by argrath)
Code Cleanup and Reorganization