wrong number of all constraints

Hi, as explained in the code below, you pre-allocate n_vertices * N / 2 memories for vector all_constraints.

mav_trajectory_generation/mav_trajectory_generation/include/mav_trajectory_generation/impl/polynomial_optimization_linear_impl.h

Lines 192 to 194 in 7aeebd9

    
           all_constraints.reserve( 
        
               n_vertices_ * N / 
        
               2);  // Will have exactly this number of elements in the end.

I think the right size should be (n_vertices - 1) * N， i.e. Num. of all constraints = Num. segments * N. But this result is still correct, because you re-calculate the size of total constraints.

	all_constraints.reserve(
	n_vertices_ * N /
	2); // Will have exactly this number of elements in the end.