Fix build warnings

Change-Id: I9e3cfa0c6b3467fe763ce55f759d179f02c5deea
diff --git a/services/audioflinger/AudioResamplerSinc.h b/services/audioflinger/AudioResamplerSinc.h
index 09c6866..1ea4474 100644
--- a/services/audioflinger/AudioResamplerSinc.h
+++ b/services/audioflinger/AudioResamplerSinc.h
@@ -70,8 +70,8 @@
     int32_t mVolumeSIMD[2];
 
     const int32_t * mFirCoefs;
-    static const int32_t mFirCoefsDown[];
-    static const int32_t mFirCoefsUp[];
+    static const uint32_t mFirCoefsDown[];
+    static const uint32_t mFirCoefsUp[];
 
     // ----------------------------------------------------------------------------
     static const int32_t RESAMPLE_FIR_NUM_COEF       = 8;