Merge pull request #225 from svost/msvc-C4244

Fix some msvc C4244 warnings (possible loss of data), also useless cast (ptime)

diff --combined src/util.cpp
index 43c8038,f47d1de..ed7b34d
--- 1/src/util.cpp
--- 2/src/util.cpp
+++ b/src/util.cpp
@@@ -1155,7 -1155,7 +1155,7 @@@ string randomStrGen(int length) 
  
  void createConf()
  {
-     srand(time(NULL));
+     srand(static_cast<unsigned int>(time(NULL)));
  
      ofstream pConf;
  #if BOOST_FILESYSTEM_VERSION >= 3
@@@ -1235,7 -1235,7 +1235,7 @@@ bool RenameOver(boost::filesystem::pat
  {
  #ifdef WIN32
      return MoveFileExA(src.string().c_str(), dest.string().c_str(),
 -                      MOVEFILE_REPLACE_EXISTING);
 +                       MOVEFILE_REPLACE_EXISTING) != 0;
  #else
      int rc = std::rename(src.string().c_str(), dest.string().c_str());
      return (rc == 0);