Replace lrint(x) with static_cast(x+0.5)

Update 9 files

Update RageSoundReader_Extend.cpp
Update RageSoundReader_Preload.cpp
Update RageSoundUtil.cpp
Update RageSoundReader_ThreadedBuffer.cpp
Update RageSoundReader_SpeedChange.cpp
Update RageSoundReader_Resample_Good.cpp
Update RageSoundReader_Merge.cpp
Update RageSoundReader_Chain.cpp
Update RageSoundMixBuffer.cpp

src/RageSoundReader_Chain.cpp

@@ -56,7 +56,7 @@ void RageSoundReader_Chain::AddSound( int iIndex, float fOffsetSecs, float fPan
 
 	Sound s;
 	s.iIndex = iIndex;
-	s.iOffsetMS = std::lrint( fOffsetSecs * 1000 );
+	s.iOffsetMS = static_cast<int>((fOffsetSecs * 1000) + 0.5 );
 	s.fPan = fPan;
 	s.pSound = nullptr;
 	m_aSounds.push_back( s );