Avoiding size_t in MIPS.

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 d488bfcb51341da7d4eed4a80b96c42fdfa79c79..69c4b00be598c7fd410e9ab3c21e6b534d12164f 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
@@ -19,11 +19,11 @@ 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
-                                size_t order_coef) { // order of the filter
+                                int16_t order_coef) { // order of the filter
   int n = 0;
 
   for (n = 0; n < HALF_SUBFRAMELEN - 1; n++) {
-    int count = (int)(order_coef - 1);
+    int count = order_coef - 1;
     int offset;
 #if !defined(MIPS_DSP_R1_LE)
     int16_t* tmp_cth;