[Fix] MED: If an IFFOCT instrument has sample loop information in the…

… extra data, the sample loop points must be doubled with each sample, just like with the normal loop data.

git-svn-id: https://source.openmpt.org/svn/openmpt/trunk/OpenMPT@22857 56274372-70c3-4bfc-bfc3-4c3a0b034d27

soundlib/Load_med.cpp

@@ -1285,15 +1285,19 @@ bool CSoundFile::ReadMED(FileReader &file, ModLoadingFlags loadFlags)
 			}
 #endif  // MPT_WITH_VST
 
+			loopStart = instrExt.loopStart;
+			loopEnd = instrExt.loopStart + instrExt.loopLength;
 			for(SAMPLEINDEX i = 0; i < numSamples; i++)
 			{
 				ModSample &sample = Samples[smp + i];
 				sample.nFineTune = MOD2XMFineTune(instrExt.finetune);
 
 				if(!isSynth && size > offsetof(MMDInstrExt, loopLength))
 				{
-					sample.nLoopStart = instrExt.loopStart;
-					sample.nLoopEnd = instrExt.loopStart + instrExt.loopLength;
+					sample.nLoopStart = loopStart;
+					sample.nLoopEnd = loopEnd;
+					loopStart *= 2;
+					loopEnd *= 2;
 				}
 				if(size > offsetof(MMDInstrExt, instrFlags))
 				{