Fix Rooibos_init injection causing duplicate calls #247
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The rooibos plugin will create a main function if it doesn't exist. And if it does, it will inject a
Rooibos_init(...)
call as its first statement.However, the way this is set up creates a duplicate call when both the function and statement already exist in the original source code. This causes problems when you need your project to control when/where it's called (i.e. to support sockets, as seen in #212).
This PR helps by detecting if such a call is already made, and only inject it if it's not found.