Returns information about the stage. A limited number of parameters are supported.
Format: StageVar(param_name) [oper] "string"
Arguments:
Return type: boolean (1 if true or 0 if false)
Error conditions: none
Details:
info.author: Compares the value of the "author" parameter in the [Info] group.
info.displayname: Compares the value of the "displayname" parameter in the [Info] group.
info.name: Compares the value of the "name" parameter in the [Info] group.
Example:
trigger1 = StageVar(info.author) = "Suika"
; Returns true if the stage author is named "Suika".