aacenc: Fix a segfault in search_for_quantizers

This reverts the removal of scoefs from AACEncContext.
It resulted in scoefs being a NULL pointer when
search_for_quantizers() is called.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/aacenc.c

@@ -598,7 +598,6 @@ static int aac_encode_frame(AVCodecContext *avctx,
             }
             for (j = 0; j < chans; j++) {
                 s->cur_channel = start_ch + j;
-                s->scoefs = cpe->ch[j].ret;
                 encode_individual_channel(avctx, s, &cpe->ch[j], cpe->common_window);
             }
             start_ch += chans;

libavcodec/aacenc.h

@@ -63,8 +63,8 @@ typedef struct AACEncContext {
     int cur_channel;
     int last_frame;
     float lambda;
-    float *scoefs;                               ///< scaled coefficients
     DECLARE_ALIGNED(16, int,   qcoefs)[96];      ///< quantized coefficients
+    DECLARE_ALIGNED(16, float, scoefs)[1024];    ///< scaled coefficients
 } AACEncContext;
 
 #endif /* AVCODEC_AACENC_H */