Cosmetics. Merge declaration and initialization.

Originally committed as revision 19952 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/atrac1.c

@@ -92,11 +92,9 @@ static const uint8_t   mdct_long_nbits[3] = {7, 7, 8};
 static void at1_imdct(AT1Ctx *q, float *spec, float *out, int nbits,
                       int rev_spec)
 {
-    FFTContext* mdct_context;
+    FFTContext* mdct_context = &q->mdct_ctx[nbits - 5 - (nbits > 6)];
     int transf_size = 1 << nbits;
 
-    mdct_context = &q->mdct_ctx[nbits - 5 - (nbits > 6)];
-
     if (rev_spec) {
         int i;
         for (i = 0; i < transf_size / 2; i++)