Fixing small syntax error in MPEG4 logging

Found that the build was breaking when the logging was enabled in
MPEG4Writer. Fixed.

Change-Id: I62c5e6d16b2ecf5644c8d46b9bbcca68a797b223
diff --git a/media/libstagefright/MPEG4Writer.cpp b/media/libstagefright/MPEG4Writer.cpp
index 5f58090..46d87df 100755
--- a/media/libstagefright/MPEG4Writer.cpp
+++ b/media/libstagefright/MPEG4Writer.cpp
@@ -1173,7 +1173,7 @@
         size_t sampleCount, int32_t duration) {
 
     if (duration == 0) {
-        LOGW("%d 0-duration samples found: %d", sampleCount);
+        LOGW("0-duration samples found: %d", sampleCount);
     }
     SttsTableEntry sttsEntry(sampleCount, duration);
     mSttsTableEntries.push_back(sttsEntry);
@@ -1304,7 +1304,7 @@
 
 void MPEG4Writer::writeChunkToFile(Chunk* chunk) {
     LOGV("writeChunkToFile: %lld from %s track",
-        chunk.mTimestampUs, chunk.mTrack->isAudio()? "audio": "video");
+        chunk->mTimeStampUs, chunk->mTrack->isAudio()? "audio": "video");
 
     int32_t isFirstSample = true;
     while (!chunk->mSamples.empty()) {