[saco] Implement and match GetInvalidModelInfoCount()

saco/game/util.cpp

@@ -1197,6 +1197,20 @@ void ReplaceBuildingModel(ENTITY_TYPE *pEntity, int iModelID)
 	_asm call edx
 }
 
+//-----------------------------------------------------------
+
+int GetInvalidModelInfoCount()
+{
+	DWORD *dwModelInfos = (DWORD *)0xA9C068;
+	int iCount = 0;
+	for(int i = 0; i != 19000; i++)
+	{
+		if(dwModelInfos[i] == NULL)
+			iCount++;
+	}
+	return iCount;
+}
+
 //-----------------------------------------------------------
 // Translate Weapon model ID into actual weapon ID.