Merged revision(s) 22398 from branches/OpenMPT-1.29:

[Fix] Fix compilation.
........


git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.28@22399 56274372-70c3-4bfc-bfc3-4c3a0b034d27

soundlib/Load_mod.cpp

@@ -1249,9 +1249,9 @@ bool CSoundFile::ReadMOD(FileReader &file, ModLoadingFlags loadFlags)
 				{
 #ifdef MPT_EXTERNAL_SAMPLES
 					mpt::ustring filenameHint;
-					if(file.GetOptionalFileName())
+					if(!file.GetFileName().empty())
 					{
-						const auto filename = file.GetOptionalFileName()->GetFilename().ToUnicode();
+						const auto filename = file.GetFileName().GetFilename().ToUnicode();
 						filenameHint = mpt::format(U_(" ({}.nt or {}.as)"))(filename, filename);
 					}
 					AddToLog(LogWarning, mpt::format(U_("This Startrekker AM file is most likely missing its companion file{}. Synthesized instruments will not play."))(filenameHint));