Stack of condition should be passed

[nanana37]

Currently

One GET function can find only one condition.

• Kind of GET functions returns struct condition or nullptr.
• Only the caller manages the stack of conditions.

GET functions: getIfCond_call, *_cmp, etc...

Need

Each get functions can manage multiple conditions.

• so that GET functions call more GET functions.
• This will enable inter-procedural.

[nanana37]

https://github.com/nanana37/eacces-modifier/pull/18