Wine-related error when SAPI isn't installed

Author: fiendish

sapi_interface.lua

@@ -28,12 +28,16 @@ require "luacom"
 -- Instantiate a SAPI voice obejct
 local engine = luacom.CreateObject("SAPI.SpVoice")
 
-if not engine then
+if not (engine and engine.GetVoices) then
    return -1
 end
 
 local NUM_SAPI_VOICES = engine:GetVoices().Count
 
+if NUM_SAPI_VOICES == nil then
+   return -1  -- Probably in Wine without SAPI support installed
+end
+
 if NUM_SAPI_VOICES == 0 then
    return -2
 end