Fix warnings in pedantic build.

This should suppress our current issues with unused parameters,
 unused variables, and set-but-not-used variables.
diff --git a/celt/celt_encoder.c b/celt/celt_encoder.c
index 6e2827f..86a3fbb 100644
--- a/celt/celt_encoder.c
+++ b/celt/celt_encoder.c
@@ -815,6 +815,8 @@
       trim -= MAX16(-QCONST16(2.f, 8), MIN16(QCONST16(2.f, 8),
             (opus_val16)(QCONST16(2.f, 8)*(analysis->tonality_slope+.05f))));
    }
+#else
+   (void)analysis;
 #endif
 
 #ifdef FIXED_POINT
@@ -1251,6 +1253,9 @@
       /*printf("%f %f ", analysis->tonality, tonal);*/
       target = tonal_target;
    }
+#else
+   (void)analysis;
+   (void)pitch_change;
 #endif
 
    if (has_surround_mask&&!lfe)