[PATCH] Structure Tree - Reporting unrecognized reqs that should be recognized

[s0600204]

When determining the requirements of a technology prior to displaying it, the structure tree currently only recognizes the requirement operators any, all, tech and civ.

class and number are also suitable options, but are not unrecognized and are thus causing warning messages.

The attached patch sets these to be recognized but ignored, as they have no effect on how the techs should displayed in the structure tree,

Refs:

• ​http://wildfiregames.com/forum/index.php?showtopic=19379&page=4#entry309112
• ​https://github.com/s0600204/0ad-structree-mod/issues/12

[elexis]

I deleted your duplicate. Please upload the patch here.

[s0600204]

suggested patch

[mimo]

In 17384:

remove warnings in structtree, fixes #3682, patch from s0600204

[mimo]

thanks for the patch