SCI32: Fix kPlayVMDPlayUntilEvent when passed zero

Fixes VMD playback in Phantasmagoria 1 while in censored mode.
kPlayVMDPlayUntilEvent is supposed to play until the last frame
when passed zero as the frame number to wait for.

1 files changed, 1 insertions, 1 deletions

diff --git a/engines/sci/graphics/video32.cpp b/engines/sci/graphics/video32.cpp
index 0efb2570a0..e6e594b211 100644
--- a/engines/sci/graphics/video32.cpp
+++ b/engines/sci/graphics/video32.cpp
@@ -671,7 +671,7 @@ VMDPlayer::EventFlags VMDPlayer::kernelPlayUntilEvent(const EventFlags flags, co
 
 	const int32 maxFrameNo = _decoder->getFrameCount() - 1;
 
-	if (flags & kEventFlagToFrame) {
+	if ((flags & kEventFlagToFrame) && lastFrameNo) {
 		_yieldFrame = MIN<int32>(lastFrameNo, maxFrameNo);
 	} else {
 		_yieldFrame = maxFrameNo;