Segfault caused by off by one error in parsing source/destination

[karenzshea]

Sample crashing request (node osrm input):

{ coordinates:
   [ [ -121.94713392, 37.32329383 ],
     [ -121.94532930, 37.32341294 ] ],
  sources: [ 0, 1, 2 ],
  destinations: [ 1 ] }

https://github.com/Project-OSRM/osrm-backend/blob/master/include/nodejs/node_osrm_support.hpp#L1185

if (destination_value > params->coordinates.size())

In the sample request, this check technically passes, and then later in the table plugin, we try to access non-existent position 2 of the input coordinates array and segfault.

The same request but with sources: [ 0, 1, 2, 3 ] returns the error as expected, "Destination indices must be less than or equal to the number of coordinates"