Fix minor error in amcl.launch

[rsilverioo]

The "kld_err" is initialized twice, and with the wrong values.
I guess you wanted to initialize the "kld_err" parameter to 0.01 and "kld_z" to 0.99.

[rsilverioo]

In fact I don't even know how you performed the localization with amcl correctly using that configuration (kld_err=kld_z=0.99).
You had to have very good and precise odometry 😅

[fjp]

Thanks for spotting this!

[fjp]

In fact I don't even know how you performed the localization with amcl correctly using that configuration (kld_err=kld_z=0.99).
You had to have very good and precise odometry sweat_smile

I think the min_particles=500 "helped" to hide this issue, which is M_X_min in the KLD sampling MCL algorithm:

The odometry sensors I use (encoders in the DG01D-E motors) are definitely not precise ;-)

I hope to find more time soon to improve odometry and work on #37