Describe the bug

Using the r.horizon module with the relevant parameters direction=0, start=0, end=45. step=14, it only calculates 3 maps for angles 0.00, 14.00 and 28.00, while it should calculate also the 4th map for angle 42.00.

To Reproduce

r.horizon elevation=rast_input direction=0 step=14 start=0 end=45 output=rast_output

System description (please complete the following information):

• Operating System: Windows 10
• GRASS GIS version: 8.2