changed checking for external type in VariableDeclaration::checkTypeRequirements() changed error msg
changed checking for external type in VariableDeclaration::checkTypeRequirements()
changed error msg

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