[FIX] Osmosis fix too many --m flags

[hdevine825]

This PR…

• Solves an issue where Osmosis fails due to a merge command after only one input.

Considerations and implementations

Uses tracking of count of land tile files to exclude the --m flag after the first file.

How to test

1. ...
2. ...

Pull Request Checklist

• Reviewed the Contributing Guidelines
  • Especially the Pull-Requests section
• Commits (and commit-messages) are understandable
• Tested with macOS / Linux
• Tested with Windows

[treee111]

Hi @hdevine825, I tested this PR locally. For me, the --m flag was needed even when only having one land file.
I didn't run with contour lines. Have you?

This is the error when using your version:

INFO:--------------------------------------------------------------------------------
INFO:# Merge splitted tiles with land, elevation, and sea
INFO:+ (tile 1 of 1) Coordinates: 134,88
ERROR:subprocess error output:
ERROR:Apr. 22, 2025 3:43:06 PM org.openstreetmap.osmosis.core.Osmosis run
INFORMATION: Osmosis Version 0.49.2
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Apr. 22, 2025 3:43:06 PM org.openstreetmap.osmosis.core.Osmosis run
INFORMATION: Preparing pipeline.
Apr. 22, 2025 3:43:06 PM org.openstreetmap.osmosis.tagtransform.impl.TransformLoader parseTranslation
INFORMATION: New translation: Adjust tunnel Layers
Apr. 22, 2025 3:43:06 PM org.openstreetmap.osmosis.core.Osmosis main
SCHWERWIEGEND: Execution aborted.
org.openstreetmap.osmosis.core.OsmosisRuntimeException: The following named pipes () and 1 default pipes have not been terminated with appropriate output sinks.
        at org.openstreetmap.osmosis.core.pipeline.common.Pipeline.connectTasks(Pipeline.java:96)
        at org.openstreetmap.osmosis.core.pipeline.common.Pipeline.prepare(Pipeline.java:116)
        at org.openstreetmap.osmosis.core.Osmosis.run(Osmosis.java:86)
        at org.openstreetmap.osmosis.core.Osmosis.main(Osmosis.java:37)