[Gpsbabel-code] fix for merging google routes

[Robert L. <rob...@us...>]

I'm applying the following change to our google reader.  It allows us
to read multiple google routes in a single invocation without memory
corruption as one might wish to do if he or she happened to want to 
build a route with maps.google.com with via points by merging multiple
routes.

If such a merging program were to exist and it were to take multiple
arguments and generate a GPX 1.1 file suitable for uploading to a web
service, invocation might look like

getgoogleroute "nashville,tn" "pomona,IL" "murphysboro,il" "st. louis, mo" > foo.gpx

and such a program might theoretically look something like this:

#!/bin/sh

while [ $# -ge 2 ];
do
  FROM=$1
  TO=$2
  # echo "Getting $FROM -> $TO "
  wget -O - \
    "http://maps.google.com/maps?q=$FROM to $TO&output=js" > /tmp/gpxr.$#
  CMD="$CMD -f /tmp/gpxr.$#"
  shift
done

gpsbabel -i google $CMD  -x simplify,count=250 -o gpx,gpxver=1.1 -F -