same as for all other geometry functions, teapot takes double, not GLdouble now.
[freeglut] / include / GL /
drwxr-xr-x   ..
-rw-r--r-- 681 freeglut.h
-rw-r--r-- 9705 freeglut_ext.h
-rw-r--r-- 27110 freeglut_std.h
-rw-r--r-- 639 glut.h