Fix logging & marker overlap errors - #3954

What type of PR is this.

1. Bug
2. Change
3. Enhancement

What have you changed and why?

Perf branch recently added logging for a couple of previously silent errors:

1. Macros now throw an RPT warning when they have the wrong parameter count.
2. createMarker now throws a script error when the marker already exists.

Our logging macros were extremely prone to having the wrong parameter count, and the fuel station marker logic attempted to generate multiple markers with the same name if there were multiple fuel pumps on the same grid ref. Fixed all of these.

Please specify which Issue this PR Resolves.

closes #XXXX

Please verify the following and ensure all checks are completed.

1. Have you loaded the mission in LAN host?
2. Have you loaded the mission on a dedicated server?

Is further testing or are further changes required?

1. No
2. Yes (Please provide further detail below.)