Merged revision(s) 22100 from trunk/OpenMPT:

[Fix] MED: Don't enable Amiga resampler if any stereo samples are found. Fixes silent playback with samples that contain identical but inverted sample data on both channels (https://www.un4seen.com/forum/?topic=15448.msg144058#msg144058).
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git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.30@22102 56274372-70c3-4bfc-bfc3-4c3a0b034d27

soundlib/Load_med.cpp

@@ -919,6 +919,7 @@ bool CSoundFile::ReadMED(FileReader &file, ModLoadingFlags loadFlags)
 		{
 			sampleIO |= SampleIO::stereoSplit;
 			length /= 2;
+			m_SongFlags.reset(SONG_ISAMIGA);  // Amiga resampler does not handle stereo samples
 		}
 		if(instrHeader.type & MMDInstrHeader::DELTA)
 		{