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vpx_temporal_svc_encoder: initialize outfile to avoid warning

Change-Id: I53077092342bc35fd783e1b7dcb80b21677f11c1

--- a/examples/vpx_temporal_svc_encoder.c

+++ b/examples/vpx_temporal_svc_encoder.c

@@ -12,6 +12,7 @@

 //  encoding scheme based on temporal scalability for video applications

 //  that benefit from a scalable bitstream.

+#include <assert.h>

 #include <math.h>

 #include <stdio.h>

 #include <stdlib.h>

@@ -438,7 +439,7 @@

 }

 int main(int argc, char **argv) {

-  VpxVideoWriter *outfile[VPX_TS_MAX_LAYERS];

+  VpxVideoWriter *outfile[VPX_TS_MAX_LAYERS] = {NULL};

   vpx_codec_ctx_t codec;

   vpx_codec_enc_cfg_t cfg;

   int frame_cnt = 0;

@@ -569,6 +570,8 @@

     outfile[i] = vpx_video_writer_open(file_name, kContainerIVF, &info);

     if (!outfile[i])

       die("Failed to open %s for writing", file_name);

+

+    assert(outfile[i] != NULL);

   }

   // No spatial layers in this encoder.

   cfg.ss_number_layers = 1;