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/RageSoundUtil.cpp

@@ -94,7 +94,7 @@ void RageSoundUtil::ConvertFloatToNativeInt16( const float *pFrom, std::int16_t
 {
 	for( int i = 0; i < iSamples; ++i )
 	{
-		int iOut = std::lrint( pFrom[i] * 32768.0f );
+		int iOut = static_cast<int>((pFrom[i] * 32768.0f) + 0.5);
 		pTo[i] = clamp( iOut, -32768, 32767 );
 	}
 }