javascript sprintf error since translation update

[mimo]

When changing perspective to an AI player, I've quite often the error ERROR: JavaScript error: uncaught exception: [sprintf] property "name" does not exist

this message happens only after changing perspective and taking an AI player. The string involved is due to BuildRestriction.js, for example markForTranslation("%(name)s cannot be built on another building or resource") when the AI tries several positions to place its building. Putting some printouts in BuildRestriction.js, the variable name is well defined.

To reproduce it easily, it is best to take a map with limited room to build, for example the cyclades skirmish map.

[sanderd17]

In 15090:

Fix problem with sprintf errors being thrown when the AI places structures on the wrong places, make the code more uniform. Fixes #2485