Merge pull request #432 from hean01/master

Fix issue were env. sound plays on title screen.
lmb attack now obeys MAIN1 lock
Merge pull request #434 from josephbleau/lockfix

lmb attack now obeys MAIN1 lock
no need to copy an ItemStorage here, this is probably optimized out by gcc/mingw but in MSVC this crashes the program when compiled: as it is the temporary ItemStorage is destructed without having its init() called first
Merge pull request #435 from josephbleau/bugfix

no need to copy an ItemStorage here