fix(macro): fix self_ reference when multiple method arguments supplied

[Xenira]

Refs: #504

Description

When having multiple arguments in a method that takes a self_ reference the wrong argument was removed from the argument list.

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[coveralls]

Pull Request Test Coverage Report for Build 16247521910

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 22.331%

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Totals
Change from base Build 16242476045:	0.0%
Covered Lines:	870
Relevant Lines:	3896

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💛 - Coveralls