Always print the exception to stderr

apps/openmw/main.cpp

@@ -390,12 +390,12 @@ int main(int argc, char**argv)
     catch (std::exception &e)
     {
 #if OGRE_PLATFORM == OGRE_PLATFORM_LINUX || OGRE_PLATFORM == OGRE_PLATFORM_APPLE
-        if (isatty(fileno(stdin)))
+        if (!isatty(fileno(stdin)))
-            std::cerr << "\nERROR: " << e.what() << std::endl;
-        else
 #endif
             SDL_ShowSimpleMessageBox(0, "OpenMW: Fatal error", e.what(), NULL);
 
+        std::cerr << "\nERROR: " << e.what() << std::endl;
+
         ret = 1;
     }