Correct the calculation of the year for the 31'st of December of 2000
[wine] / dlls / glut32 /
drwxr-xr-x   ..
-rw-r--r-- 42 .cvsignore
-rw-r--r-- 268 Makefile.in
-rw-r--r-- 26302 glut.c
-rw-r--r-- 6700 glut32.spec