Fix FLAC extension native part compilation issues

Issue: #2352

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=146469547

extensions/flac/src/main/jni/Android.mk

@@ -31,7 +31,7 @@ LOCAL_C_INCLUDES := \
 LOCAL_SRC_FILES := $(FLAC_SOURCES)
 LOCAL_SRC_FILES := $(FLAC_SOURCES)
 
 
 LOCAL_CFLAGS += '-DVERSION="1.3.1"' -DFLAC__NO_MD5 -DFLAC__INTEGER_ONLY_LIBRARY -DFLAC__NO_ASM
 LOCAL_CFLAGS += '-DVERSION="1.3.1"' -DFLAC__NO_MD5 -DFLAC__INTEGER_ONLY_LIBRARY -DFLAC__NO_ASM
-LOCAL_CFLAGS += -D_REENTRANT -DPIC -DU_COMMON_IMPLEMENTATION -fPIC
+LOCAL_CFLAGS += -D_REENTRANT -DPIC -DU_COMMON_IMPLEMENTATION -fPIC -DHAVE_SYS_PARAM_H
 LOCAL_CFLAGS += -O3 -funroll-loops -finline-functions
 LOCAL_CFLAGS += -O3 -funroll-loops -finline-functions
 
 
 LOCAL_LDLIBS := -llog -lz -lm
 LOCAL_LDLIBS := -llog -lz -lm

extensions/flac/src/main/jni/flac_parser.cc

@@ -453,7 +453,8 @@ int64_t FLACParser::getSeekPosition(int64_t timeUs) {
   }
   }
 
 
   FLAC__StreamMetadata_SeekPoint* points = mSeekTable->points;
   FLAC__StreamMetadata_SeekPoint* points = mSeekTable->points;
-  for (unsigned i = mSeekTable->num_points - 1; i >= 0; i--) {
+  for (unsigned i = mSeekTable->num_points; i > 0; ) {
+    i--;
     if (points[i].sample_number <= sample) {
     if (points[i].sample_number <= sample) {
       return firstFrameOffset + points[i].stream_offset;
       return firstFrameOffset + points[i].stream_offset;
     }
     }