Fix further 'variable set but not used' warnings reported from GCC 4.6.0.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29809 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/pitch_detector.c

@@ -982,7 +982,9 @@ static void record_data(void)
 static void record_and_get_pitch(void)
 {
     int quit=0, button;
+#ifndef SIMULATOR
     bool redraw = true;
+#endif
     /* For tracking the latency */
     /*
     long timer;
@@ -1016,7 +1018,9 @@ static void record_and_get_pitch(void)
                     quit = main_menu();
                     if(!quit)
                     {
+#ifndef SIMULATOR
                         redraw = true;
+#endif
                         record_data();
                     }
                     break;