Solar Farm shows up as 'undefined' in log

[Jonas]

Shift+constructing Solar Farms yields "undefined x11 constructed." as of 1.3.0.0. I guess there is a string missing somewhere, though it isn't entirely clear to me why the same string as the display name on the button isn't used.

[Jonas]

Noticed now that this also applies to Hydro Plants and Broadcast Towers, so I guess it is related to them being upgraded buildings.

[freeroot]

I commit the fix (commit ee17208). Thx for feedback !