Use of non-static variables and functions

[JayFoxRox]

There's many cases of non-static variables in the source-code:

https://github.com/Cxbx-Reloaded/XbSymbolDatabase/blob/6820d3f74afed86b2b34810590f46ce95420755b/XbSymbolDatabase.c#L1617

https://github.com/Cxbx-Reloaded/XbSymbolDatabase/blob/6820d3f74afed86b2b34810590f46ce95420755b/XbSymbolDatabase.c#L1622

...

This also includes all of the OOVPA, which appear to use non-static variables via OOVPA_XREF:

https://github.com/Cxbx-Reloaded/XbSymbolDatabase/blob/6820d3f74afed86b2b34810590f46ce95420755b/OOVPA.h#L136-L140

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This pollutes the object files with many symbols with limited use-cases. It also hints to the compiler that it shouldn't optimize these functions as they could be called differently.

The project should probably only use non-static for what's found in XbSymbolDatabase.h