avcodec/opusenc_psy: Fix warning: ISO C90 forbids mixed declarations and code

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit f8b17fe332)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/opusenc_psy.c

@@ -399,13 +399,12 @@ static void celt_search_for_intensity(OpusPsyContext *s, CeltFrame *f)
 {
     int i, best_band = CELT_MAX_BANDS - 1;
     float dist, best_dist = FLT_MAX;
+    /* TODO: fix, make some heuristic up here using the lambda value */
+    float end_band = 0;
 
     if (s->avctx->channels < 2)
         return;
 
-    /* TODO: fix, make some heuristic up here using the lambda value */
-    float end_band = 0;
-
     for (i = f->end_band; i >= end_band; i--) {
         f->intensity_stereo = i;
         bands_dist(s, f, &dist);