Workaround OSX clang broken map operator[] using ifdef guards and manual find/insert.
Workaround OSX clang broken map operator[] using ifdef guards and manual find/insert.

douglas-larocca/solidity,debris/solidity,ruchevits/solidity,shahankhatch/solidity,vaporry/solidity,chriseth/solidity-doc-test,ruchevits/solidity,gluk256/solidity,chriseth/solidity,LianaHus/solidity,ruchevits/solidity,arkpar/solidity,ruchevits/solidity,ethers/solidity