Remove useless intermediate var

Originally committed as revision 13505 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/ra144.c

@@ -324,7 +324,7 @@ static int ra144_decode_frame(AVCodecContext * avctx,
     uint16_t coef_table[3][30];
     uint16_t *gbuf2[4] =
         {coef_table[0], coef_table[1], coef_table[2], ractx->lpc_coef};
-    unsigned int a, c;
+    unsigned int c;
     int i;
     int16_t *data = vdata;
     unsigned int energy;
@@ -345,10 +345,10 @@ static int ra144_decode_frame(AVCodecContext * avctx,
     do_voice(ractx->lpc_refl, ractx->lpc_coef);
 
     energy = decodeval[get_bits(&gb, 5) << 1]; // Useless table entries?
-    a = t_sqrt(energy*ractx->old_energy) >> 12;
 
     gbuf1[0] = dec2(ractx, gbuf2[0], 0, 0, ractx->old_energy);
-    gbuf1[1] = dec2(ractx, gbuf2[1], 1, energy > ractx->old_energy, a);
+    gbuf1[1] = dec2(ractx, gbuf2[1], 1, energy > ractx->old_energy,
+                    t_sqrt(energy*ractx->old_energy) >> 12);
     gbuf1[2] = dec2(ractx, gbuf2[2], 2, 1, energy);
     gbuf1[3] = rms(ractx->lpc_refl, energy);