luastate -> ifCFunction era isCFunction

nova funcao isclosed()

luaobject -> mudança no erro da call

src/java/luajava/LuaObject.java

@@ -374,8 +374,15 @@ public Object[] call(Object[] args, int nres) throws LuaException
 
 		    if (err != 0)
 		    {
-		      String str = L.toString(-1);
-		      L.pop(1);
+		      String str;
+		      if (L.isString(-1))
+		      {
+		        str = L.toString(-1);
+			      L.pop(1);
+		      }
+		      else
+		        str = "";
+
 		      if (err == LuaState.LUA_ERRRUN.intValue())
 		      {
 		        str = "Runtime error. " + str;
@@ -388,6 +395,11 @@ else if (err == LuaState.LUA_ERRERR.intValue())
 		      {
 		        str = "Error while running the error handler function. " + str;
 		      }
+		      else
+		      {
+		        str = "Lua Error code " + err + ". " + str;
+		      }
+
 		      throw new LuaException(str);
 		    }
 

src/java/luajava/LuaState.java

@@ -100,6 +100,14 @@ public synchronized void close()
     _close(luaState);
     this.luaState = null;
   }
+
+  /**
+   * Returns <code>true</code> if state is closed.
+   */
+  public synchronized boolean isClosed()
+  {
+    return luaState == null;
+  }
 
   /**
    * Return the long representing the LuaState pointer
@@ -304,7 +312,7 @@ public boolean isFunction(int idx)
     return (_isFunction(luaState, idx)!=0);
   }
 
-  public boolean ifCFunction(int idx)
+  public boolean isCFunction(int idx)
   {
     return (_isCFunction(luaState, idx)!=0);
   }