added another chdman test (nw)

.gitattributes

@@ -8046,12 +8046,15 @@ src/osd/windows/winutil.c svneol=native#text/plain
 src/osd/windows/winutil.h svneol=native#text/plain
 src/osd/windows/winwork.c svneol=native#text/plain
 src/regtests/chdman/chdtest.py svneol=native#text/plain
+src/regtests/chdman/input/createcd_cue_audio_silence_wav_20_tracks/in.cue svneol=native#text/plain
+src/regtests/chdman/input/createcd_cue_audio_silence_wav_20_tracks/silence.wav -text
 src/regtests/chdman/input/createcd_cue_empty/in.bin -text
 src/regtests/chdman/input/createcd_cue_empty/in.cue svneol=native#text/plain
 src/regtests/chdman/input/createcd_iso_empty/in.iso -text
 src/regtests/chdman/input/createcd_nrg_empty/in.nrg -text
 src/regtests/chdman/input/createcd_toc_empty/data.bin -text
 src/regtests/chdman/input/createcd_toc_empty/in.toc svneol=native#text/plain
+src/regtests/chdman/output/createcd_cue_audio_silence_wav_20_tracks/out.chd -text
 src/regtests/chdman/output/createcd_cue_empty/out.chd -text
 src/regtests/chdman/output/createcd_iso_empty/out.chd -text
 src/regtests/chdman/output/createcd_nrg_empty/out.chd -text

src/regtests/chdman/input/createcd_cue_audio_silence_wav_20_tracks/in.cue

@@ -0,0 +1,60 @@
+FILE "silence.wav" WAVE
+TRACK 01 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 02 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 03 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 04 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 05 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 06 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 07 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 08 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 09 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 10 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 11 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 12 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 13 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 14 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 15 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 16 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 17 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 18 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 19 AUDIO
+  INDEX 01 00:00:00
+FILE "silence.wav" WAVE
+TRACK 20 AUDIO
+  INDEX 01 00:00:00