contrib: a52: remove scary dummy error messages

contrib/src/a52/liba52-silence.patch

+diff -ru a52dec.orig/liba52/imdct.c a52dec/liba52/imdct.c
+--- a52dec.orig/liba52/imdct.c	2012-02-06 19:40:21.000000000 +0200
++++ a52dec/liba52/imdct.c	2012-02-06 19:40:53.000000000 +0200
+@@ -419,13 +419,11 @@
+ 
+ #ifdef LIBA52_DJBFFT
+     if (mm_accel & MM_ACCEL_DJBFFT) {
+-	fprintf (stderr, "Using djbfft for IMDCT transform\n");
+ 	ifft128 = (void (*) (complex_t *)) fftc4_un128;
+ 	ifft64 = (void (*) (complex_t *)) fftc4_un64;
+     } else
+ #endif
+     {
+-	fprintf (stderr, "No accelerated IMDCT transform found\n");
+ 	ifft128 = ifft128_c;
+ 	ifft64 = ifft64_c;
+     }

contrib/src/a52/rules.mak

@@ -13,6 +13,7 @@ $(TARBALLS)/a52dec-$(A52DEC_VERSION).tar.gz:
 a52dec: a52dec-$(A52DEC_VERSION).tar.gz .sum-a52
 	$(UNPACK)
 	$(APPLY) $(SRC)/a52/liba52-pic.patch
+	$(APPLY) $(SRC)/a52/liba52-silence.patch
 ifndef HAVE_FPU
 	$(APPLY) $(SRC)/a52/liba52-fixed.diff
 endif