getSignalDensityAlongAxis() uses wrong coordinates when calling getMagnitude()

[osechet]

In getSignalDensityAlongAxis(): https://github.com/davidrmiller/biosim4/blob/ee9505a281b0341fd4aacacb29592138a52b5f52/src/getSensor.cpp#L132

The coordinates passed to the getMagnitude() function should be tloc, not loc.

[davidrmiller]

Thanks for reporting this. I'll verify then update the code. Good catch!