Update audio code to use size_t more correctly,

webrtc/modules/audio_coding/codecs/isac/fix/source/lattice_mips.c

Index: webrtc/modules/audio_coding/codecs/isac/fix/source/lattice_mips.c
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/source/lattice_mips.c b/webrtc/modules/audio_coding/codecs/isac/fix/source/lattice_mips.c
index c596922168e0e74e86bc63fd2903e4bb693334b0..7197b153891118d0b10dfad5e8363a434ea97f7c 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/source/lattice_mips.c
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/source/lattice_mips.c
@@ -17,11 +17,11 @@ void WebRtcIsacfix_FilterArLoop(int16_t* ar_g_Q0,     // Input samples
                                 int16_t* ar_f_Q0,     // Input samples
                                 int16_t* cth_Q15,     // Filter coefficients
                                 int16_t* sth_Q15,     // Filter coefficients
-                                int16_t order_coef) { // order of the filter
+                                size_t order_coef) { // order of the filter
   int n = 0;
 
   for (n = 0; n < HALF_SUBFRAMELEN - 1; n++) {
-    int count = order_coef - 1;
+    int count = (int)(order_coef - 1);
     int offset;
 #if !defined(MIPS_DSP_R1_LE)
     int16_t* tmp_cth;