Description: Fix CVE-2018-10017
 See https://lib.openmpt.org/libopenmpt/2018/04/08/security-updates-0.3.8-0.2-beta31-0.2.7561-beta20.5-p8-0.2.7386-beta20.3-p11/
 Fix possible out-of-bounds memory read with IT and MO3 files containing many
 nested pattern loops.
Origin: upstream, https://source.openmpt.org/browse/openmpt?op=revision&rev=10042
Bug-Debian: https://bugs.debian.org/895406
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
--- a/soundlib/Snd_fx.cpp
+++ b/soundlib/Snd_fx.cpp
@@ -1042,7 +1042,8 @@ std::vector<GetLengthType> CSoundFile::G
 			if(GetType() == MOD_TYPE_IT)
 			{
 				// IT pattern loop start row update - at the end of a pattern loop, set pattern loop start to next row (for upcoming pattern loops with missing SB0)
-				for(CHANNELINDEX nChn = 0; nChn < GetNumChannels(); nChn++)
+				pChn = memory.state.Chn;
+				for(CHANNELINDEX nChn = 0; nChn < GetNumChannels(); nChn++, pChn++)
 				{
 					if((pChn->rowCommand.command == CMD_S3MCMDEX && pChn->rowCommand.param >= 0xB1 && pChn->rowCommand.param <= 0xBF))
 					{