resolved windows issues

mix/CodeHighlighter.cpp

@@ -109,7 +109,7 @@ void CodeHighlighter::processError(dev::Exception const& _exception)
 void CodeHighlighter::processComments(std::string const& _source)
 {
 	unsigned i = 0;
-	unsigned size = _source.size();
+	size_t size = _source.size();
 	if (size == 0)
 		return;
 	while (i < size - 1)

mix/ContractCallDataEncoder.cpp

@@ -127,7 +127,7 @@ unsigned ContractCallDataEncoder::encodeSingleItem(QString const& _data, Solidit
 		}
 	}
 
-	unsigned dataSize = _type.dynamicSize ? result.size() : alignSize;
+	size_t dataSize = _type.dynamicSize ? result.size() : alignSize;
 	if (result.size() % alignSize != 0)
 		result.resize((result.size() & ~(alignSize - 1)) + alignSize);
 	_dest.insert(_dest.end(), result.begin(), result.end());

mix/FileIo.cpp

@@ -102,6 +102,7 @@ void FileIo::writeFile(QString const& _url, QString const& _data)
 	}
 	else
 		error(tr("Error writing file %1").arg(_url));
+	file.close();
 	m_watcher->addPath(path);
 }
 
@@ -184,7 +185,7 @@ QStringList FileIo::makePackage(QString const& _deploymentFolder)
 
 	QUrl url(_deploymentFolder + "package.dapp");
 	QFile compressed(url.path());
-	QByteArray qFileBytes((char*)dapp.data(), dapp.size());
+	QByteArray qFileBytes((char*)dapp.data(), static_cast<int>(dapp.size()));
 	if (compressed.open(QIODevice::WriteOnly))
 	{
 		compressed.write(qFileBytes);

mix/MixClient.cpp

@@ -40,7 +40,7 @@ namespace mix
 {
 
 Secret const c_defaultUserAccountSecret = Secret("cb73d9408c4720e230387d956eb0f829d8a4dd2c1055f96257167e14e7169074");
-u256 const c_mixGenesisDifficulty = c_minimumDifficulty; //TODO: make it lower for Mix somehow
+u256 const c_mixGenesisDifficulty = 131072; //TODO: make it lower for Mix somehow
 
 bytes MixBlockChain::createGenesisBlock(h256 _stateRoot)
 {