MD2 interpolation code fails when mobjs tics is -1 and state tics is not

I'm assuming this is the case from talk with Jay on Discord, this probably just needs DrawMD2Ex in src/hardware/r_opengl/r_opengl.c to be modified to fix.

mentioned in merge request !212 (merged)

closed via commit b63bd97b

closed via merge request !212 (merged)

mentioned in commit b63bd97b