Minor changes to magic variables.

gas moves to "msg", ripemd160 returns hash160.

libsolidity/GlobalContext.cpp

@@ -58,7 +58,7 @@ GlobalContext::GlobalContext():
 													  FunctionType::Location::ECRECOVER)),
 					 make_shared<MagicVariableDeclaration>("ripemd160",
 							make_shared<FunctionType>(TypePointers({std::make_shared<IntegerType>(256, IntegerType::Modifier::HASH)}),
-													  TypePointers({std::make_shared<IntegerType>(256, IntegerType::Modifier::HASH)}),
+													  TypePointers({std::make_shared<IntegerType>(160, IntegerType::Modifier::HASH)}),
 													  FunctionType::Location::RIPEMD160))}
 {
 }

libsolidity/Types.cpp

@@ -397,11 +397,11 @@ MagicType::MagicType(MagicType::Kind _kind):
 		break;
 	case Kind::MSG:
 		m_members = MemberList({{"sender", make_shared<IntegerType const>(0, IntegerType::Modifier::ADDRESS)},
+								{"gas", make_shared<IntegerType const>(256)},
 								{"value", make_shared<IntegerType const>(256)}});
 		break;
 	case Kind::TX:
 		m_members = MemberList({{"origin", make_shared<IntegerType const>(0, IntegerType::Modifier::ADDRESS)},
-								{"gas", make_shared<IntegerType const>(256)},
 								{"gasprice", make_shared<IntegerType const>(256)}});
 		break;
 	default: