made a variable conversion from vec4 to vec3 explicit
made a variable conversion from vec4 to vec3 explicit

MaxReimann/troen-simulator,MaxReimann/Troen,MaxReimann/Troen,philippotto/GP2013,MaxReimann/troen-simulator,MaxReimann/Troen,MaxReimann/troen-simulator,philippotto/GP2013,MaxReimann/Troen,philippotto/GP2013,philippotto/GP2013,philippotto/GP2013