TINSEL: Discworld Noir: Support for opcode 217. (#2988)

This adds support for opcode 217. I have made the assumption that it's
voiceover, and given it an enum value to reflect that. This enables
voiceover to be played in the opening movie.

engines/tinsel/tinlib.cpp

@@ -153,7 +153,7 @@ enum MASTER_LIB_CODES {
 	TRYPLAYSAMPLE, UNDIMMUSIC, UNHOOKSCENE, UNTAGACTOR, VIBRATE, WAITFRAME, WAITKEY,
 	WAITSCROLL, WAITTIME, WALK, WALKED, WALKEDPOLY, WALKEDTAG, WALKINGACTOR, WALKPOLY,
 	WALKTAG, WALKXPOS, WALKYPOS, WHICHCD, WHICHINVENTORY, ZZZZZZ, DEC3D, DECINVMAIN,
-	ADDNOTEBOOK, ADDINV3, ADDCONV, SET3DTEXTURE, FADEMUSIC, HIGHEST_LIBCODE
+	ADDNOTEBOOK, ADDINV3, ADDCONV, SET3DTEXTURE, FADEMUSIC, VOICEOVER, HIGHEST_LIBCODE
 };
 
 static const MASTER_LIB_CODES DW1DEMO_CODES[] = {
@@ -4503,8 +4503,8 @@ NoirMapping translateNoirLibCode(int libCode, int32 *pp) {
 		pp -= mapping.numArgs - 1;
 		debug(7, "%s(0x%08X)", mapping.name, pp[0]);
 		break;
-	case 217: // STUBBED
-		mapping = NoirMapping{"217", ZZZZZZ, 1};
+	case 217:
+		mapping = NoirMapping{"VOICEOVER", VOICEOVER, 1};
 		pp -= mapping.numArgs - 1;
 		debug(7, "%s(0x%08X)", mapping.name, pp[0]);
 		break;
@@ -5488,6 +5488,11 @@ int CallLibraryRoutine(CORO_PARAM, int operand, int32 *pp, const INT_CONTEXT *pi
 		TalkOrSay(coroParam, IS_SAYAT, pp[3], pp[1], pp[2], 0, pp[0], pp[4], pic->escOn, pic->myEscape);
 		return -5;
 
+	case VOICEOVER:
+		// Noir only
+		TalkOrSay(coroParam, IS_SAY, pp[0], 0, 0, 0, SystemVar(SV_USER2), false, pic->escOn, pic->myEscape);
+		return -1;
+
 	case SCALINGREELS:
 		// Common to both DW1 & DW2
 		pp -= 6;			// 7 parameters