Add plNearestPoints, contribution from Blender

Thanks!

src/Bullet-C-Api.h

@@ -162,10 +162,14 @@ extern "C" {
 	/* extern  plRigidBodyHandle plObjectCast(plDynamicsWorldHandle world, const plVector3 rayStart, const plVector3 rayEnd, plVector3 hitpoint, plVector3 normal); */
 
 	/* Continuous Collision Detection API */
+	
+	// needed for source/blender/blenkernel/intern/collision.c
+	double plNearestPoints(float p1[3], float p2[3], float p3[3], float q1[3], float q2[3], float q3[3], float *pa, float *pb, float normal[3]);
 
 #ifdef __cplusplus
 }
 #endif
 
+
 #endif //BULLET_C_API_H