Checkwall

[bWolfie]

Pull Request Prelude

• I have followed proper Hercules code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR will be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

1. Adds the checkwall() script command, which will return if wall exists. Needed for scripts which attempt to delete non-existent walls.
2. Adds the new checkwall() to agit_main_se script, which attempts to delete a non-existent wall when War of Emperium starts.

Affected Branches:

• master
• stable

Issues addressed:

#2119

Known Issues and TODO List

None known.

[HerculesWSAPI]

This change is 

[4144]

i think better use strdb_exists for check is wall present or not

[dastgirp]

Similar to #2150, except that this one has script edits

[bWolfie]

Similar to #2150, except that this one has script edits

Can you put the script edit into yours? It's necessary to stop console spam due to the delwall now sending warnings/debugs.

[Helianthella]

it might be better to have a getwallinfo("<name>", <info>) command instead so it's more versatile

*getwallinfo("<name>", <info>)

Returns info on a wall created by setwall().

<info> can be:
WALLINFO_MAP        map name
WALLINFO_X          X axis location
WALLINFO_Y          Y axis location
WALLINFO_DIR        direction
WALLINFO_SHOOTABLE  whether or not it's shootable

And then to check if a wall exists you could do getwallinfo("name", WALLINFO_MAP) != ""

[Emistry]

<info> can be:
WALLINFO_MAP        map name
WALLINFO_X          X axis location
WALLINFO_Y          Y axis location
WALLINFO_DIR        direction
WALLINFO_SHOOTABLE  whether or not it's shootable

Dont forget WALLINFO_SIZE too, to return the size of the wall