Fixes laterballons icon update problem and the infinite burst issue. Blowing it now requires to attack the balloon with a tank not the other way around. Adding a message when you blow up the latexballoon. You can burst the balloon with a hot weapon like a lit lighter (is_hot() items)
Merge pull request #6049 from phil235/LatexballoonFix

Fixes latexballons icon update problem and the infinite burst issue.