Updating Opus to release 1.1

opus-1.1.tar.gz downloaded from http://www.opus-codec.org/

R=sergeyu@chromium.org

Review URL: https://codereview.chromium.org/107243004

git-svn-id: svn://svn.chromium.org/chrome/trunk/deps/third_party/opus@239448 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/celt/fixed_generic.h b/celt/fixed_generic.h
index 657e67c..ecf018a 100644
--- a/celt/fixed_generic.h
+++ b/celt/fixed_generic.h
@@ -40,7 +40,7 @@
 #define MULT16_32_Q16(a,b) ADD32(MULT16_16((a),SHR((b),16)), SHR(MULT16_16SU((a),((b)&0x0000ffff)),16))
 
 /** 16x32 multiplication, followed by a 16-bit shift right (round-to-nearest). Results fits in 32 bits */
-#define MULT16_32_P16(a,b) ADD32(MULT16_16((a),SHR((b),16)), PSHR(MULT16_16((a),((b)&0x0000ffff)),16))
+#define MULT16_32_P16(a,b) ADD32(MULT16_16((a),SHR((b),16)), PSHR(MULT16_16SU((a),((b)&0x0000ffff)),16))
 
 /** 16x32 multiplication, followed by a 15-bit shift right. Results fits in 32 bits */
 #define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_16SU((a),((b)&0x0000ffff)),15))