TSAGE: Don't assert in PlayStream::getFileOffset() when no data exists

This function returns 0 when no valid voice data is found, at the place
where it's used. This prevents the game asserting during the intro, when
no speech file is present, in platforms with limited disk space

1 files changed, 3 insertions, 1 deletions

diff --git a/engines/tsage/sound.cpp b/engines/tsage/sound.cpp
index c8ad8c1281..e2fe21c6d7 100644
--- a/engines/tsage/sound.cpp
+++ b/engines/tsage/sound.cpp
@@ -2670,7 +2670,9 @@ void PlayStream::dispatch() {
 }
 
 uint32 PlayStream::getFileOffset(const uint16 *data, int count, int voiceNum) {
-	assert(data);
+	if (!data)
+		return 0;	// no valid voice data found
+
 	int bitsIndex = voiceNum & 7;
 	int byteIndex = voiceNum >> 3;
 	int shiftAmount = bitsIndex * 2;