Mark symbol as static, patch by Diego 'Flameeyes' Pettenò, flameeyes gmail com.

Originally committed as revision 13027 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/nellymoserdec.c

@@ -264,7 +264,9 @@ static void get_sample_bits(const float *buf, int *bits)
     }
 }
 
-void nelly_decode_block(NellyMoserDecodeContext *s, const unsigned char block[NELLY_BLOCK_LEN], float audio[NELLY_SAMPLES])
+static void nelly_decode_block(NellyMoserDecodeContext *s,
+                               const unsigned char block[NELLY_BLOCK_LEN],
+                               float audio[NELLY_SAMPLES])
 {
     int i,j;
     float buf[NELLY_FILL_LEN], pows[NELLY_FILL_LEN];