Avoid redefinition of typedef

Change-Id: I53e243eb4b1a1ace9406d97a22fe1001de8e77a3

common/ivfdec.h

diff --git a/common/ivfdec.h b/common/ivfdec.h
index ea294fa..9d81919 100644
--- a/common/ivfdec.h
+++ b/common/ivfdec.h
@@ -11,6 +11,7 @@
 #ifndef AOM_COMMON_IVFDEC_H_
 #define AOM_COMMON_IVFDEC_H_
 
+#include "aom/aom_encoder.h"
 #include "common/tools_common.h"
 
 #ifdef __cplusplus
@@ -18,8 +19,6 @@
 #endif
 
 int file_is_ivf(struct AvxInputContext *input);
-
-typedef int64_t aom_codec_pts_t;
 int ivf_read_frame(FILE *infile, uint8_t **buffer, size_t *bytes_read,
                    size_t *buffer_size, aom_codec_pts_t *pts);