SCI: Silence a gcc conversion warning

engines/sci/sound/soundcmd.cpp

@@ -61,7 +61,7 @@ reg_t SoundCommandParser::kDoSoundInit(int argc, reg_t *argv, reg_t acc) {
 }
 
 int SoundCommandParser::getSoundResourceId(reg_t obj) {
-	int resourceId = obj.getSegment() ? readSelectorValue(_segMan, obj, SELECTOR(number)) : -1;
+	int resourceId = obj.getSegment() ? (int)readSelectorValue(_segMan, obj, SELECTOR(number)) : -1;
 	// Modify the resourceId for the Windows versions that have an alternate MIDI soundtrack, like SSCI did.
 	if (g_sci && g_sci->_features->useAltWinGMSound()) {
 		// Check if the alternate MIDI song actually exists...