Fix off-by-1 error in calculating height
Fix off-by-1 error in calculating height

The height of the graphics should be VTX_DIST * (max # vertices per side - 1),
because # spaces = # vertices - 1.

smpcole/theoriginalgot,smpcole/theoriginalgot,smpcole/theoriginalgot,smpcole/asoiaf-vs-tac,smpcole/asoiaf-vs-tac,smpcole/theoriginalgot,smpcole/asoiaf-vs-tac,smpcole/asoiaf-vs-tac